I would definitely get the pump benched. I have never heard of a bad experience from Seth either, and I think the rate was something like $250 just for max/balance.
Then 5x.012's are only 80% bigger than a 215 injector, I would definitely go with 5x.014's (145% bigger), or 7x.012's (152% bigger, and probably better street manors).
I like the idea of 7 holes, but havent tried them yet. Definitely going to after the wedding is paid for ;-)
Its funny you mentioned the 7 hole injectors as I've heard the opposite. They have ****ty street manners and don't make the power the 5 hole injectors can. I don't know that for a fact though. Could someone with actual experience chime in and give us some answers? Smokem? LOL