I have the Levinson 436 Monoblocks and would be glad to speak with you offline. I have not heard the Theta's.
Mark Levinson 436 vs. Theta Citadel monoblocks
I'm thinking about to get either one of these to match Dynaudio S5.4, I know they are both good amps, can't decide which is better for S5.4, I like a slight warm sounding, but still with details, big sound stage, not too forward not too laid back, any members had them before? thanks!