Beware chasing details.
I would say if you are a tinkerer, leave yourself room to tinker without commitment. That is, if you want to rotate 2 or 3 different speakers or a couple of different amps, then do that! Don't chase absolutes.
It's kind of important to know yourself here. If you are just always going to be playing with your setup then get yourself organized for that rather than a constant stream of buying.
Otherwise, it's important to understand where you want your system to go. What have you heard that's _better_ and not just _different? What did that sound like?