I would upgrade the one you have with a pair of better ones. I like the rsl over svs. Despite having the best CS in the biz, it comes at a premium. The free two way shipping, the app, and upgrade path etc, comes at a price for all. I don’t need my hand held, so I vote for straight performance which, imo is the RSL 12s. Obviously there is a sea of great subwoofers out there, but for high value, RSL wins for me, plus they also have top notch customer service. This isn’t a knock against SVS, as I am an owner. But my upgrade path is a different direction. I would also recommend you look at Rythmik, PSA, monolith, and maybe starke, just to get more ideas.