Can anyone recommend an FM Receiver that would play into a relatively high end system?

If you want good sound quality, provided you have good FM stations in your area, a dedicated high quality FM tuner (and a good antenna) can be an excellent source.  

Here's a great place to get info - https://www.fmtunerinfo.com/

I'm almost 50 miles away from the main broadcast towers and the sound quality from my Magnum Dynalabs Etude rivals CD playback.  I also have an Onkyo T-9090 II which is another excellent tuner. 

Most of the radio broadcast over the internet is compressed.  Radio Paradise is an exception.  Great sound quality and well curated tunes.

I've only experienced Sirius / XM as far as satellite radio goes.  It sounds awful compared to over the air FM broadcast.

+1 on the Sony XDR-F1HD

I picked it up years ago after reading a columnist in Stereophile rave about how this little thing sounded. I don't read Stereophile anymore (I got wiser), but he wasn't wrong on this little Sony thing...

Might be able to pick it up used somewhere. 

Big Greg

don’t know much about Sirius but Internet Radio Stations can sound pretty good.  I am in Chicago and our favorite Classical Station, WFMT, sounds much better in digital, and no dropouts.  We also listen to high quality digital feeds from Venice, Bavaria, Switzerland, and the Netherlands.

@mahler123 I'm not saying there aren't some good streaming options, there are.  However, the vast majority of streaming is 320 kbps MP3 or lower quality.  Of course then you'll need a good quality DAC to get the best sound quality. 

You can get a nice vintage FM tuner and antenna for under $1K easily.