705/706 and 805/806 are rated for continuous 4 ohm load - may have power reserves that allow them to easily handle more difficult loads than lower models rated only for 6 ohm loads.
Going from 70X to 80X gives 30 more watts per channel of power (100W to 130W) and about 10 lbs more chassis bulk. If you need the power, you could probably find a slightly older 805 with the features you are looking for used under $500.
I guess to answer the original question - no, nothing really better than Onkyo in each class for the money. Some makes just as good, but Onkyo has been on a roll in making value laden and good sounding receivers for quite a while.
Going from 70X to 80X gives 30 more watts per channel of power (100W to 130W) and about 10 lbs more chassis bulk. If you need the power, you could probably find a slightly older 805 with the features you are looking for used under $500.
I guess to answer the original question - no, nothing really better than Onkyo in each class for the money. Some makes just as good, but Onkyo has been on a roll in making value laden and good sounding receivers for quite a while.