Well, the amps are easily one of the best, hands down. I have always had a RF amp for the last 3 years and I constintly murder anyone with same amp RMS range and similar subs. Now as far as the subs you picked, MY experience with RF subs are that they are not on that high of a level. But the ones you picked are a high grade than the ones I had. So you might be alright. If I were you, I would get either different subs or get the 15 inch version of the 12s you picked. Buying them seperately, it comes to about $690. You package was only $630. That way you use the most out of your amp, without blowing your speakers. The 15s are about 600RMS each and the amp is 1025 RMS. I hope my babbling helps /Rant
No one I know has had a MTX amp. I know they are alright. Ecoustics.com has it at 1000 RMS but the other site says 1500 RMS. Do more reseach and if it is 1500 RMS, go with that. Just remember to turn the gain down or you will blow the subs like that *snaps*
The MTX Class D amps are better than the Rockford Punchs IMO. From cracking both, I've seen better materials used in the MTX's, and better circuit design. Search reviews of them, you won't find many say bad about them, they're relatively cheap, solid amps with great SQ.
I have 3 RF HE's and 700W RMS RF amp feedin them, trust me they bump. Got to love RF. My friend also had a Rockford 400W RMS amp, it was in his dads car, 10 or so years ago. Now it is pushing some JL's, that thing still lasts and puts out. I say Rockford is up on Quality control.