Yesterday we had thought about it also..
at first our take was Parc Clementis is a large project so we will be competing with many sellers.. and mass project housing tend to get old faster due to so many ppl using the same facilities..looking at The Parc condo which now looks very old..
But I agree this is one of a good bet..
But Stirling and Parc Esta are similarly mega projects. Mega projects though have the benefit that the project would be more well known in the vicinity and more resale transactions would take place thus pushing up psf prices over time. The maintenance cost is also lower and I would disagree it would become older faster, as the sinking funds would be huge given that a lot of ppl contribute to it.
Parc Clematis seems to have lush landscaping and you still have a chance of entering 15-16xxpsf.
The Parc condo is about 10 years old and the architecture looks meh..

