You don't want your new sub to sound bloated and boomy. LOL! You'd be going backwards. Sometimes you can mistake boomy for "better" just like higher volume must automatically mean the sound is higher quality.
I have a Blu-ray that's a showcase sampler from the PBS show Legends of Jazz
(probably can find some store online that still has a copy, like CD Universe) that can test and highlight just how good or bad your sound system happens to be. Not huge bass, mind you, but excellent audiophile grade live recording quality at 24 bit, 5.1 Dolby TrueHD lossless. On my Paradigm Studio's, it's like you're right on stage with some of the great performers in the jazz and R&B world. Sadly, a couple have now passed away.
Another couple excellent audiophile level live performance Blu-ray's are Dave Matthews & Tim Reynolds: Live at Radio City Music Hall
, and the two Chris Botti titles. No, the latter discs are not all jazz trumpet, but a variety of music genres by a host of top name guest performers. Truly excellent musical performances too.
You need some titles that are superbly crafted and not fix-it-in-the-mix, dynamically dead pop recordings or synthetic movie soundtracks.