Thiel 7.2 or Revel Studios

Two clear, detailed, good imaging, well balance sounding speakers that are very musical sounding. I've sold Thiels for years, and have experience with the Revels somewhat, and heard at shows and clients homes as well.
Both probably do best with slighly different gear selection choices from what I recollect. But that goes with anything.
I think you should try whichever is more accessable and or apractical for you(unless you like the looks of one over the other).
If you like the sound, then stick with em. But make no mistake, you can get good balance out of either with careful gear selection.
To me, these are both the typical "high end sounding" audiphile speakers these days...pretty, clear, detailed.(like Wilson's, Talon's, Maggies, Joseph's,Apogee's, etc)

Sounds like you might want to indeed try your Mac amp with those 7.2's, should you go that route. Then at some time, compare a slighly more extended/agressive amp for comparison, like the Krell is. I personally like the Pass amp's on the Thiels. X350 or mono's is good on the 7.2's.
I think the Krell's would do better on Revel's byenlarge. But you gotta tinker. It's called "tweakin'!"