Budget friendly receiver choice


I want to stay with 5.1 (or better, don't see the need/benefit vs trouble of 7.2 etc) but also use the system for audio a lot. 

I have a dedicated 18" Dayton 18-22 sub (sealed enclosure)  with the excellent amp from the Elemental Design A7. Front tower speakers (various, experimenting, changing, still not found the final one). 

On my wish list:

- DSP

- pre out (so I can use other amps I have)

- nice: use build in amps for bi amping (Anthem MRX 710 i read offers that option0

- stable (to drive critical speakers if need be)

- low price certainly under $1,000 , $600 preferred (so used obviously)

- probably should be able to feed 4k TV (Vizio M75 currently)

- ideal (but not done anymore): pre/main amp split (remember these small metal U shaped bridges that good full amps had?) 

 

I mentioned the Anthem MRX 710 because I just saw one offered locally (without the software/mic). To stay under $600, I likely need to make more compromises. 

 

Suggestions (full make/model so I can look up prices and reviews)? 

kraftwerkturbo

I think the MRX 710 is a good choice for $600 and will be a step up in sound quality over the mass market AVRs.  Here’s another one on eBay for $600 that may already have the software and also with no mic but you’d need to pay shipping from Michigan, whatever that is.  
https://www.ebay.com/itm/325425609116

Look for last year's model being sold for big discounts.  There are some amazing deals when the models change over.  

soix, that one is near by (pawnshop) and I already offered them (but reduced their price since the needed software/mic is not included). Unclear if it handles my 4k TV (Visio M75). 

 

12many: last year may not be enough. Looking also at Marantz SR7008, a cheap SR7002 ($150), and some others. I need to make a list of SUITABLE receiver that come close to my wishlist, but then still need to research how those amps hold up under difficult loads, if they allow bi amping (using the 'spare' unused amps), have full 'pre out' (to use external amps for example for front/main speakers for 2 channel audio setup), if and what DSP they use, 4k capable, etc.