Any tips on what is best?

I have a PS3 and was using TVersity with Windows XP. Overall it was pretty good but I did not use its extra features at all, so am open to other options.

Im using Windows 7 64 bit and am thus looking for best software options again.

Look into the PS3 Media Server I use it and love it:

http://ps3mediaserver.blogspot.com/

Yes, I agree the PS3 Media Server software is great...it will even stream my .ts files recorded from my Sat receiver....

See HTPC and media extender forum for lots of threads discussing PC to media streaming.