Will this amp work as described below:

I would say no.  I have the xa25 with 92db Salk speakers.  It's plenty loud for me, but if you are playing at 90db with 87db speakers, I would think you want more power.

nope, more power !

250-300W rms - MINIMUM !

stay heavy

The measurements on the website are for full Class A operation with .01 % when it goes into class A/B operation it is well north of 100 wpc before it reaches 1%.  With Fritz's speakers in that size room it will be louder than you can stand.  The specs on Fritz's speakers are deceptive as they been used at shows with under 10 wpc tube amps. 

i would think the xa30.8 would be plenty in the op's application, even for loud listening... tremendous power reserve in the pass amps, and fritz's lovely speakers are not hard to drive, more efficient than stated 87 db/w/m in real world applications

I use a Pass Int25 in a slightly larger sized room with Fritz Carrera 7 BE's

but at 70dB not 90. 

I can not imagine the 30.8 not being able to throw you out a window.

Seems like 90Db in 13 x 13 all you would hear is the room or am I crazy?

That is very loud, do you have problem with your hearing?

if not you will probably get that problem sooner than later.

As mentioned, you will be wearing hearing aids before your time.  One of the great things about high quality audio is that you don't have to turn it up to sound good.  

appreciate all responses very much. There seems to be mixed views on the power needed to give me my low to mid 90's spl's. Rock and Roll is best served loudly. With good equipment sounds great.  For what it's worth my hearing is very good at present. Just don't want to under buy power, as my ATI 6002 AMP in my main listening room is superb, tight, powerful dynamic, clarity, etc.  with tons left over, driving very efficient Tekton Double Impacts upgraded, in very large area.  I'm guessing,  at my level of listening I would be in the amps AB mode anyhow? Just shopping for the lack of a better term, and using people on this sites expertise that far exceeds my own. Thanks all. Just in the early stages now.

Keep and use the the Peachtree AMP 500, The Pass amp is a sideways move.