http://www.dansdeals.com/archives/116337 - Eichlers in Boro Park or Flatbush is having 40% off of tallis now.
If you prefer to go straight to the manufacturer,
Keter Judaica in Boro Park has a decent sized warehouse and can give you many options - black, white or blue stripes, Light, Medium or "Heavy" (weight of the talis fabric, it's not *that* heavy but it usually lasts a little longer).
Malchut Judaica is just a block or two away IIRC, and has a very good selection as well - I personally find the fabric to be softer and less slippery than Keter's non-slip but it's also about 10-15% more expensive.
Greenfield Judaica also has a good selection, but i don't know anything about the products themselves.
If you take the Q64 bus from 71st Ave in Forest Hills to Main Street, check out Safra Judaica and Gift World Judaica you can get a feel for what you'd like.
