I had a Primare CD31 for a while and thought it was very good despite the bass being a bit sluggish. If changing brands is ok, I recommend an Audio Aero Prima mk2. There is a silver one for sale here now, just like mine, and I think it is the best CD player you can buy in this price range.
I've had 12 CD players so far and know the 5i well. The 5i compared to the Prima seems to lack liquidity and resolve, which translates into less musicality. The Prima is an incredible buy - vacuum tubes are where it's at if you want to hear real music from a CD player...IMHO.
See my system page for lots more info on these and many others.
Arthur