Pass XA30.5 vs. X150.5


How different are these two amps? I have read the website, but was wondering on your thoughts and opinions as to the differences in performance.
koestner
X-.5 (dot 5) series of amps is much improved over the original X series IMO. X-.5 amps sound much more like XA amps than the original X.
Yes, 150 watts versus 30, but the XA.5 seem to be conservatively rated, at least they sound that way. You should be ok with the lower power with speakers 89db or higher, less then that you are probably pushing it.
My speakers are 92 db and 4 Ohms, but they have lots of drivers 2-10", 2-7", 2-3" and a tweeter (Montana XP, plus I have a large room (35 x 25 x 10 foot ceiling). I was just wondering if the additional price of the XA30.5 used was mainly because of it being a newer model, or is it also better in performance?