Well that's where I'm running into an issue. Do i get the speaker thats rated 50-120W RMS and assume I have 14.4V running that can push 50W to the speaker? Or do I get a lesser rated speaker? I really would like something that will use the full potential of the amp.

Here's the link to one of the speakers I was looking at:

http://www.mbquart.com/2003/en_US/products/prod_detail.asp?cat=auto&strt=1&model=DSD+216&series=DISCUS+Series

You can see its rated at 50-120W (which is RMS).

So assuming I can only push 30W per channel, would these speakers sound alright.. and I don't mean would they work, I mean would 30W be sufficient to drive these decently.

BTW, peak power on the amp is 90Wx4 if that helps.