Below is my humble opinion that I have for mining of bitcoins in Singapore
In Singapore (ranked 21st in electricity tariff, en.wikipedia.org/wiki/Electricity_pricing), it is not advisable to even mine with FPGA. If you have any CPU/GPU mining rigs, mine for scrypt coins instead.
As for ASIC for bitcoin, the only feasible device you can buy now is the ASICMiner Erupter USB Miner. It cost about 100SGD and only have 333MH/s which computes to ROI in 5months.
Avalon has missing orders, ButterflyLabs has over 30k backlogs of orders, BitFury & KnCMiner has yet deliver a working ASIC.
I personally have received 2 x 5GH/s miners from Butterfly Labs but my order was Aug 2012. It basically mined back what I spent on these miners in just one month and it uses less than 80watts.
I am currently searching for the ASIC chips (yes, the important thing is the chip itself), then I will find some PCB developers to develop a board for it and maybe we can have the first ASIC selling in Singapore
