Onk has its good sides and bad sides. Don't confuse the old gear with the new gear, the old stuff was way better on the amp side and longevity.
Good side= best bang for the buck
Bad side = runs hot and some reliability issues
My buddy has a 15 year old Onk that has about 12 speakers connected to it and it gets heavy play and is still going strong. Try that with one of today's AVRs and it will shut down in about 30 seconds.
I have a 15 year old Pio that has seen everything from heavy theater use to 4 years in the garage system (in the Texas heat) and right now, it is in use in my Brother-In-Laws system driving some low ohm speakers.