I have that combo.
Does not run HOT.
Warm, yes, but not hot.
Obviously it is necessary to have good ventilation.
Regarding XLR vs. unbalanced: There are many posts on the forum about this. Various opinions exist. Clearly, though, the main reason for balanced is to exclude extaneous "noise", especially in long runs.
Most have found that in short runs it does not make a difference. Just rout the cables away from AC to avoid induction.
HTH
_________________________
Living Room:
5.1 Surround and 4channel inline room
990/7700/6-KEF-107s/LFM1 x 2/ SMS Awaiting Trinnov
Millenium dts decoder;Digital Director
Players: Tascam CD01U/SonyCX455 x 3/DV955/BDP83
Old Sony 60" SXRD TV
Zone 2 (also liv-Room: listening to music while Mrs watches TV): Crown SL2 preamp/D40 Amp/Stax Headphones
My "Man-cave":
4 channel-only inline room. No TV (thank heaven)!!!
990/755/4-KEF 107s
Tascam CD01U/dts decoder/digital director
Alesis 16x4x2 mixer
Recorders Alesis HD24/ML9600/Crown CX844s/SonyDAT/Tascam DA38
Ham Radio Shack (KB1STH) ICOM/Yaesu/Drakes x 3