Upgrade turntable from an Amazon Model 2

Anyone with some experience with Amazon turntables have a suggestion on how to better an Amazon Model 2? I've been very happy with it but now that I've gone to the ASR Basis Exclusive, I feel like there's more to squeeze out of the LPs than I'm hearing. I've been happy with my Moerch UP4, but maybe that's part of the issue. I've tried a DP-6 and it's not a better arm, at least in my system. I've been through my LP12 stage and an idler period and like the Amazon better than both of those but I'm wondering what's the next step up? Only limitation is size. It has to fit on a Target wall shelf because my room is very bouncy.