Just Curious - About using a AV Receiver as main unit

Just curious about something.

I know it is preferable to use a Integrated Amp or Pre-Amp+Amp combo as your main unit in the system but sometimes I see used AV's receivers see from manufacturers who make really good high end 2 channel equipment and these receivers sell for less then say a 2 channel component from the same manufacturer (units from say Rotel, Anthem, Arcam, Marantz, etc). Also, since we are talking about AV Receivers, I guess it's fair to compare them to SS Amps. If your into Tubes, then that is whole different story.

I wonder sometimes if you start a build using one of the AV receivers instead of the 2 channel component, would that be a good system to build off of.

I will say for myself, I started with a Denon AVR-5700 (which I still have and was a beast in it's day) and I think it was an excellent piece of equipment and had a great 2 channel section.

Last year I bought a Integrated amp but honestly, I could have easily stayed with the Denon and build off of that.

Sure, these AV's receivers wont compare to components that are way up there in the thousands but if your budget is bit tight I think these components would be great to start with and I am not talking about your $400 dealer receiver from best buy, I mean AV's receivers that were top of the line in their day and now can be had for much cheaper. 

Well just curious and my opinion.

Thanks