Parasound Zamp v.3 Runs Too Hot

I have a Peachtree Audio iDecco (for sale), running a Parasound Zamp V.3, to Totem Acoustics Arro floorstanders, and I usually play music loud because the system is in my upstairs bedroom. The other day when running my system loud for about a half hour, the amp shut off automatically and the display indicated "Hi-Temp". The speakers are 6 ohms and the amp will run 60 amps into them, so with that said, is there a better budget amp that will run my speakers loudly for a sustained amount of time without running too hot? Is it a matter of 6 Ohms drawing too much current for most amps?

Please give some advice/recommendations for a budget setup.

Thank you.