Mark Levinson 333.5 vs Emotiva XPR-1 Monoblocks

We are pushing Thiel 3.6 speakers with our dual-monaural Mark Levinson 333.5 amp. we are considering a switch to the Emotiva XPR-1 Monoblocks. Does anyone have actual experience with both the 333.5 (or 333) and the XPR-1's?

If not with the Levinson amp, then any experience vs. the XPR-1's with another higher end amp?

We have 2-30 watt receptacles ready for the job in hand. Also have 20 amp receptacles. Both services are on dedicated circuits.