Take a look at some the books available on the subject.

The whole point of making your own guitar is to make your own decisions among the many choices that have to be made as you sort out which combination of features you want.

I heartily recommend "Make Your Own Electrinc Guitar", by Melvyn His****. I got mine through StewMac.

http://www.stewmac.com/cgi-bin/hazel.cgi?client=89707797&action=SERVE&ITEM=catalog/p.html&A=%2BNAME_LINK%3DMake_Your_Own_Electric_Guitar

Dan Erlewine is their in-house expert luthier. He's got some really good books on the subject, but I think Melvyn's is a better place to start the process. And you're a lot better off to spend $25 on some decent instruction before you lay out the coin for the materials.

Good luck!