does anyone knows if bluenile or jp will be a better choice?
Blue Nile alone buying blind will be a terrible choice.
You have a couple of options. If you want to get a super big, proven ideal cut (HCA score below 2), quality stone for your budget, I suggest you sign up on Pricescope forum and the users there will be able to suggest a James Allen stone for you. Nobody is paid but they are all diamond crazy like me so they are experts at helping you find the BEST high-quality stone. You confirm know you are getting something good.
If you go with JannPaul, you will be paying prices higher than on James Allen, but you will be able to see the stones with your own eyes. However, for your budget you will only be able to get a smaller stone than if you choose to buy online.
In the past, I went with JP (because I was scared to buy online) and I certainly received top quality service and a Super Ideal cut stone with outstanding performance. It is a reasonable price for Super Ideal stone and given the fact that really most mall jewelers in Singapore just want to cheat you and sell you lousy stuff, it is better to go with JannPaul than most other jewelers, although I have since dealt with another jeweler/diamond wholesaler (cjdiamonds.com) and two of my friends have bought 1 ct diamond halo rings from CJ diamonds at great prices. I would recommend getting price quotes from him too.
However, choosing to buy a Super Ideal cut from JannPaul is still more expensive than if I had gone on Pricescope forum and asked them to tell me which high quality ideal cut diamond to buy. Looking back on it now, I think I would rather have purchased a bigger diamond for the same price, but at that time when I purchased my JP diamond I really did not know any jewelers that I could trust and I was afraid to buy online.
Anyway there is also another option. I found ConciergeDiamonds.com on Reddit (based in Los Angeles) and I have asked him to help me look for a stone. I will most likely be buying from him cause he is able to beat James Allen pricing but maintain quality and I trust him based on his reviews on Reddit, Facebook and his Instagram. He works remotely with diamond buyers from all over the world and I know he will find me something good. And he will send me pictures and videos of all the stones shortlisted for me and photograph the ring before shipping.
If I were you and I want to get the best deal in the whole wide world, I will really fire all my cannons. I will first go to JannPaul and get quotes and suggested stones for my budget.
I will go on Pricescope forum and ask them to recommend me James Allen or other vendors’ stones for my budget and let them explain to me the value of the recommended stones and why it is good.
I will send Concierge Diamonds an e-mail (or just go on the live chat) telling them my budget and ask them if they can look for stones according to my budget. Tell him that this Redditor girl from Singapore sent you and asked him to help you lol (cause he is committed to going the extra mile for Redditors). Anyway he seems very honest to me and you can’t lie based on a GIA cert and ideal cut HCA scores <2. You CAN compare pricing between stones based on a GIA cert and scope images to check that you are getting an outstanding deal on a high-quality stone.
I will visit CJ diamonds in Boon Keng and view his stones - this could be another budget but still high quality option and you are able to see the stones in real life. I saw the diamond halo ring made for my friend and it’s really good. 1 carat diamond halo for 10k. Very sparkly cut. Worth buying. Of course not everybody buys 1 ct.
Overall, I feel that my personal strategy to get the biggest, cheapest but still ideal cut (HCA<2) high quality diamond at a budget price would be either James Allen or Concierge Diamonds. And Concierge Diamonds will custom make the ring for you at an unbeatable price but if you look at their Instagram the craftsmanship is still high quality. So personally I am going with Concierge Diamonds.
And after all your hard work, I would suggest that you compile all the diamond price quotes w/ GIA number, and information given from all of the above sources, and post everything on Pricescope forum and let others who are experts help you make a final decision on where to buy your diamond. Then you will know you are getting the absolute best deal possible.
P.S. most people are not crazy bargain hunters like me so it’s really easier to go to JannPaul and pay money for a confirmed outstanding diamond with top-quality service.