There is a very easy way to determine if the Yamaha truely sounds better or if it's just the differences in your rooms... ask your dad if you could borrow it for a day and test them head to head. I personally think you would be much better off spending your money on speaker upgrades, and room treatments. But if you do a head to head comparo between the twoo receivers and decide the Yamaha is the missing link, then by all means it's your money.
But at least demo the Yamaha in your living room before you part ways with your cash, because I really doubt that's your problem.
