The crystal debate always go back and forth. A little can be nice, as russ mentioned above.
I think a blend of base malts can help a lot. Here's what I do for most of my hop-forward beers, scaled accordingly for the gravity you're looking for...
32% Pilsner Malt
32% 2-Row Malt
25% Wheat Malt
4% Carapils
7% Corn Sugar (added at the end of the boil)
Also, you didn't ask this, but a water profile high in sulfates, a low mash temperature, a low finishing gravity and an attenuative American yeast like WLP090 (these last 3 are related) will all help in accentuating a hoppy beer.