If you are after the Pass Labs sound and you are not happy with the XA30.8 then I’d thoroughly recommend the XA25 as a cheaper alternative. I sold my XA30.8 and bought an XA25 for a similar reason to the OP. I felt that as nice as the XA30.8 was, it was too warm and it didn’t have tight enough bass. The XA25 has that Class A relaxed sound but it coupled with a lower noise floor and high levels of speaker control (lower output impedance). It also has fairly similar power output to the XA30.8 (Stereophile measured 90 watts into 8 ohms). Pure Class-A extends to about 25 watts which is similar figure to the XA30.8 from memory.
It also weighs about half as much so you won’t get a hernia lifting it (ask me how I know)......
Please; as much as I like XA25, XA 30.8 is in a different league. You get 50% more of the filter capacitance 120,000 microfarads per side vs. 80K on the XA 25. 30.8 walks all over XA25 in bass dept. Perhaps, it is a bit sweeter in the midrange, but overall it shines over the XA25. Do not get me wrong, XA25 is an awesome amp especially for someone putting their toes in Pass ocean for the first time.

