Best amp for my set-up (Kenwood DNX hu)?

I have a small 2 door car and recently installed a Kenwood DNX996XR HU, I've been using a JL 500/5 amp for years which I still love (its just BIG) but was considering getting an Alpine PDX-V9 as its more recent, would that be a good move? My goal is SQ.

The JL has class-AB for the fronts and D for the sub, and the Alpine is all D.

Its currently powering:

• Infinity Kappa 60csx 100w components.
• Alpine type-R 350w 8" ported sub.