Just some advice needed, as currently I am deciding for which setup to go for.

The speakers I use are the DIamond 9 series (9.3 for mains, 9cm for my center and 9.1 for my rears), I don't really see myself doing the 7 channel speaker set up. So decision is do I spend the money on the XPA 5, or get the UPA 7 and have the ability to Biamp the mains?

Listening to my HT is top priority and music comes second. But if I can use for equal purposes, even better for me

MY main speakers have a power handling rating of 30-120W, and my center is 30-150W, and my rears are 20-100W.

SO this is my dilemma. They are 6 ohm speakers. I am currently using a Yamaha 663, so if that can drive them without any issues, I am certain the UPA 7 will be more than sufficient.