I have the XA25 and it’s fabulous ! the 30.8 is a bit more hard hitting and transparent. It will easily drive your speakers ! I’m a tube guy and have been for decades.. but have had my share of issues with power amps.. I was going to go with the FW J2 or one of the SIT versions. after some discussions with Pass and Mark at Reno Hifi, I was directed to the XA lineup to match my needs. my speakers are 95dB at 8 ohms with a 1 ohm variance throughout the freq range.. easy load, but needs lots of current, Daedalus Athena.
I still might get a first watt amplifier, the SIT3 or J2.. as they excel is certain areas, but overall.. The XA does everything well. Good luck !