for LFS, i'd say Pacific has been consistently getting stocking some interesting varieties.
Not in the city but Pets warehouse (both carle place and copaigue) occassionally stock interesting things but they generally focus on ferns, crypts and easy stems like cabomba and anacharis. Most of their potted plants come from a florida nursery.
I heard much hype about the copaigue store and was not so impressed when i went there.
Honestly, I have more fun looking at Joraan's tanks.
There are some local hobbyists that have kept species in fantastic shape and form so offering to purchase may score you something beautiful that normally isnt available at retail in the area.