Couple quick comments.....
unless you start with green, unkilned malt, you're not really making crystal malt at home.
For my own tastes, a 100% base malt APA, no matter what kind of malt, turns out kinda boring. I prefer the depth of flavor from a blend of malts. If you're concerned about crystal hiding too much flavor, try the new Great Western Sacchra malts. Kinda like a cross between crystal and Munich.