Willing to buy whatever drivers for the plans!

Since I have no idea how to draw out plans, I am willing to buy whatever drivers from parts-express to experiment in a BIB. I already have the B20s so that one is out. I will be making one BIB for 8" drivers, 6" drivers, and 4.5" or 4" driver. Please vote for one driver in each size category. The community needs to come up with the plans.

I think parts-express is the only one with a no-ask return policy. I don't know of any other companies that have this policy, but if you know of one that does then I am willing to try.