xr's are the better set im pretty sure. They are the higher line i would put the components in the front. If you really don't want to drill new holes for the tweets you can mount them right infront of the mid in the door using a piece of metal. Just make sure the mid doesn't hit it when the speaker begins to move a lot and the tweeter clears the door.

The amp should say if its rms or peak. I have a suspicion its probably peak but i dunno. Itll work but I personally would sell it and invest in a better quality amp. Its still better than nothing though.