Yes, definitely MTSims. Also check out Sims2Heaven. I get a lot of stuff from Gamesir, but a lot of it tends to appear at either of those two sites at some point. Also Daislia has a lot of nice things and HuiGuiBiLuoHai also has some lovely objects. Good old Rose is my favourite creator for Bodyshop stuff (especially her TaoBao sets).
Hmm, that's all I can think of without my game open!