1800-2000wrms on 2 RSd 10's?
Are you on crack?
RSd 12's are amazing subs for the $, but the 10's leave something to be desired. They could most likely use a little stiffer suspension.
But, as far as the 12's...give a pair 1000-1200w daily and your will love them. We did 144.x dB at 48hz w/ 2 12's on an mm1000.1d in an ext cab Dodge Ram w/ just an audio enhancer prebuilt kvpr box. (Didnt have time to build a box, just stuck them in the AE box)
Also, we have run pairs of RSd 12's on the RSd1200.1...they had more than enough power w/ that amp.