I prefer Discount for my 'domestic orders': Reaper, GW, WotC, and anyone else I can find in most stores.
Plus a few exotics lines they have exclusive.
But they don't carry (or didn't carry last I looked) some of the really hot lines:
Celtos
Confrontation
Assassin.
Excalibur.
I have actually ordered some of those direct from their European makers. And gotten my stuff before a New Wave order from the same brand that I'd placed months beforehand.
Assassin in particular was a very good experience.
http://www.assassin.de/Shop/Englisch/index2.html
It's a real 'Garage Operation' of a guy in Germany.

Given the cost of the shipping I ordered the bulk of his line in a split order between myself and another gamer.
The minidealer discussion group on yahoo has a database of vendors:
http://groups.yahoo.com/group/minidealerdiscussion/database?method=reportRows&tbl=2
Not many are listed there, but those that are show what they carry.
Even for some of the most exotic lines, there are ways to avoid New Wave.
They still owe me one figure from over a year ago...