The Prima will smoke the Rega hands down and it would be garanteed that you will like it a lot better. I've owned both for a long time and it's way better. Something else to consider would be the Arcam FMJ DV27A. I think I ultimately would take it over the Prima, it's just a little tighter and extended, plus if you care it plays DVDs with awesome pictuer quality.
Another thing to consider with the Prima is the fact that it does have a tube output with soldered in tubes that require replacement every two years. You will have to send it back to an Audio Aero tech to do this, the sound will gradualy degrade, so it won't be totally obvious when the tubes are going.
Another thing to consider with the Prima is the fact that it does have a tube output with soldered in tubes that require replacement every two years. You will have to send it back to an Audio Aero tech to do this, the sound will gradualy degrade, so it won't be totally obvious when the tubes are going.