I heard a Sugden a few years ago driving a pair of Harbeths 30.1 and it was a match made in heaven. I have heard the Pass 30.8 but not the xa25. The 30.8 is tough to beat if you have the rack room, a strong back and need a large space heater. The Pass xa25 solves all the negatives I have listed with the .8 series and Teajay's review is more and favorible. Btw I am in the market for a low power amp and the xa25 and the Linear Tube Audio ZOTL40 are my top 2 choices.