Re: hELP WITH THD % IN RECEIVERS
In the mid hi-fi range of A/V receivers it is hard to beat the Onkyo TX SR806 THX Ultra 2 . If you "google" on line you could find it from $599-$650 at credible internet dealers. It has almost every featureset one could want with copious power.
Since you have an Outlaw amplifier you might consider the soon to be released Emotiva UMC-1 audio video processor. It will be released at $699 and looks like one beautiful and well-made component. One buys directly from Emotiva.com.