First welcome to the site!
I guess it all depends on how much space you're looking for, what's most important to you and what budget you are working with.
I have lived in Central Phase 2/Hideaway condos on Bank/McLeod and would definitely recommend. Pretty good condos, nice location, close to everything, the pool/cabanas are a nice plus for Centretown. Could also look into the Bowery, I believe I had seen some decent units to purchase and good sizes although I find this area of downtown/Centretown a little less desirable than Central.
I find many of the newer builds areound downtown are offering smaller and smaller condos and higher and higher prices so I dont find them particular attractive or of good value; including Tribeca, Gotham, Soba, etc.. but perhaps just my personal opinion.
Others which are at the very high end of the market would be The Merit, reResidences or Cathedral Hill.
Best of luck! And keep us posted!