Just to confuse you further. There is another answer not yet mentioned. Neither.
Instead buy one of those USB audio interfaces. That way you get all the pre amp and connection options of an AVR or receiver but in a much smaller form factor. Plus you can connect your PC, network, tablet and phone (may require adaptor).
The least expensive ones require power from something else, usually a PC and cost from ~$100. Focusrite Scarlet is a good reference to have a look at but there are many alternatives.
If you want one with it's own power supply they are a little more expensive. Have a look at the Focusrite Scarlet 6i6 as an example and see if it might suit you. ~$250. If you have money to invest try the MOTU Audio Express. It comes with a built in DSP, detailed metering and an easy to use, graphical 7 band parametric equaliser available on all inputs, outputs and mix buses from any application. Better bass management than any AVR or receiver. Not cheap though at ~$400.