GATTON  I don't have a lot of experience with other feed readers but Vienna works very well for me. As a matter of fact I consider it a plus that I was able to set it up and begin using it so quickly having no experience with other standalone readers. The only other thing I have used is Google Reader. I'm very pleased with Vienna's features and performance. Worth a download for sure.  
(Version 2.2.0.2209)

GATTON  I've had the AOL Radio player for a couple of months and I've been very pleased with it. There's a large variety of stations. The only thing that might be considered a drawback is that you do have to sign up for a free AOL account. However you could use all bogus info if you wanted.

I've been pleased with the variety of stations and the sound quality (although I don't have high expectations for this on my computer anyway.) Recommended.

Oh and as an aside I raved about this program to a friend and she attempted to install the Windows version on her PC. The PC version however is not standalone and you have to install the rest of AOL's crap software. Score another one for the Mac I guess. I'm very happy AOL doesn't bundle this with their other stuff the way they do on Windows.  
(Version 1.2b1 build 138)