New amp advices please

I am always building or rebuilding speakers and I am getting more into playing around with speakers than messing with components these days… For instance I have a pair of maggies 2.6s that I have fixed and mod along with a pair of Dennis Murphy’s 3 ways that built… However this could change next month. So I am looking for an amp in the $2000 or less range that will drive all kinds of speakers because I never know what I will have next. I have a pair Heathkits W5s (fully mod) that I like but they won’t push most of the speakers I come across. I also have a Mac 2125 that is ok (great low end) but nothing great and I really don’t like the highs on that Mac…. Right now I was thinking about Pass Labs X150 or a Mac 252 or even a Rogue mono blocks but I am worried about the watts being that its tube… One thing I listen for in an amp is good sound stage good low-end and the highs are not harsh…

Anyway I am totally lost and any thoughts or opinions would be grateful!!!

PS. I use a tube pre amp…