Can't speak to the Rocket 88 but I switched from a cj prmier 16II and premier 350 combo to the SLI-80F1 and have never looked back. I love the amp very musical. The cj was great also but just needed to downsize.
The SLI-80 should be very good. I ran a Cary V12R through my SLP98P (the amp ran hot enough to cook burgers on) but sounded great, now I have the CAD 120's. Cary gear is very impressive. I just sold a pair of Linn Majik 140's (fantastic sound) and replaced them with Lipinski 707's that take things to a very high level. Wish I could afford the SLI-80 just to have one. Best of luck.