Thanks for the replies guys. I work at an audio store, and I'm very confident in my installer (he's won plenty of awards.) It looked to us like we're going to have to cut the grill, but we're gonna try and prevent that if possible.
Anyways, I'm not worried about bass from those speakers. I have an RTA meter, so we shold be able to cross them over with the tweets and sub to give pretty darn good sound.
I'll let ya know how things turn out, with pictures if relevant.