I suggest this is certainly not the right place to find out which amplifiers you prefer. What speakers do you have? Or are you considering others? You cannot determine what works best without hearing them with speakers you own. Dealers should be expected to offer home auditions to qualified customers, and if they won't, vote by spending your money elsewhere. I have other thoughts but won't post them here.
Boulder monoblocks
I am very interested in the Boulder monoblocks which look very impressive and have very impressive specifications. However, there are only a few serious reviews published on these amps and for $55,000 there are many options. Essentially, for me the most important quality of an amplifier is its bass performance, I like bass that is ultra fast, tight, controlled, and with lots of slam. Another amplifier I am considering are the giant Mark Levinson No. 33 Reference monoblocks. I heard them at a local showroom and thoght that it sounded amazing. I am wondering how it compares to the Boulder monoblocks. Anyone who has had experience with the Boulder monoblocks I would appreciate your comments. Thanks.