u need 50watts continous i think for a ps2, so anything over 75watts rms is good.
ur screens look good (: personally if it were me i'd cut a rectangle hole into some mdf the size of ur glovebox and slide the ps2 thru there, vinyl it up with ur stock looking trim so when u drop the glovebox down theres a little display kinda.
im currently in the process of moulding this screen in that position into my dash with fibreglass to make it look as stock as possible.