Good upgrade from Levinson 33H's

I have been reading discussions on here and in audio reviews, looking for a good upgrade from my Levinson 33H's. First off, these are the best amps I have heard, but I have not heard many of the new wonder amps discussed on many threads here. I am running all Stealth cable, with the Genesis 4 tower speakers.....so the amp I choose to upgrade to, will be running only my Mids / Tweeters. Some, but not all, that I have interest in are, BAT, Joule, Lamm, MBL,CAT,Atma-sphere, Soulution......generally the usual suspects. Each seems to have it's good and bad points, or rather, supporters and critiques, probably depending on many occassions to what supporting equipment people may be using. I guess the bottom line here for me is, which amps in this list or not, would be a substantial upgrade from my Levinson 33H's.......I don't want a lateral move! To all those that will say.....you have to audition....and what do you like or what are you looking for....yes of course. However, without traveling the continent to audition them all in someone elses system, what should my short list be? Thanks in advance for sharing your experiences.