Bel Canto EvO 200.2 monoblocks vs Pass X350

Having owned AP speakers and both of the other amps I would say it is a matter of personal preference. Remember that the Pass need major wall juice whereas the BCs are more efficient; ergo, unless you have a stiff AC you may have to upgrade there to take advntage of the PL.

What's in the rest of your system? The Pass amps can make certain speakers (eg, CLS) sound as good or better than other amps. But they may not prove that big an upgrade in other situations.