i have a Harman Kardon 2600 now, but wondering if its worth it to move to the onkyo 616?? is it any better or what i have as good or better? seems like it has a lot of nice features, but i dont want to downgrade. they have a good price on it, but again, is what i have any better already?? any opinions would be great, or is there another one i should be looking at?