Revel F228be

With a $7-8K budget you could probably buy the Revel F226's and a Coda CSiB integrated amp (and keep your SVS sub).

With a $10K budget you could probably buy the Revel F226 BE's and a Coda CSiB integrated amp (and keep your SVS sub).

The biggest issue with either scenario is how rarely the CSiB hits the used market; and, they sell very quickly when they do.

Bottom line, upgrading from the Rotel amp is good advice; so, expanding your speaker and/or amp choices might be necessary. Have fun and good luck!

My philosophy on a system is different than most peoples. You can make cheaper speakers sound amazing with better electronics, but the opposite is not true! Also, speakers are harder to sell than other stereo components mainly because many are large/heavy and expensive to ship. The exception to this rule for me is if I can find an end game speaker that I will have for 10+ years! 

Used Focal Kanta 2 would be a nice one to audition. Good luck ! 

I’d actually suggest selling the Rotel and the sub a just starting from scratch.  Buying a better amp and two smaller sealed subs, even if that means spending a little less on speakers, will yield you much better and more balanced overall sound. FWIW. 

@mofojo In room they have a giant bass which must be controlled not to hide the dynamics. Well set up fantastic sounding. On everything. Keep on rocking :)