There is a whole host of internet homebrew stores:
Northern Brewer
Austin Homebrew Supply
Homebrew Heaven
High Gravity Brew
Homebrewers Outpost
just to name a few. Northern and Austin are the most commonly used and Homebrewers Outpost is out of AZ. I've been brewing for several years and have a great deal of recipes especially in extract with specialty grain. Many Imp Stouts and Belgians.
Note: If you're going to brew big beers, you'll need to bottle. Big beers can age well and you don't want to tie up kegs for years.

Good luck