Hi rainsoothe
Which particular model of Rotel did you purchase? In what way was the Rotel better than the Rega? Was the sound punchier and more lively .So the PM6005 would be considered an upgrade. Maybe I should audition it eventhough I am not a fan of Marantz products after my experience with the Pm6003. But I do listen to vinly. Is the PM6005's phono stage good?
Whatever you do, you should try to audition the stuff.
First of all, there is quite a noticeable difference between the Marantz PM6003 and the PM6004 or the PM6005. And by difference I mean improvement. The 6003 sounds tinny.
Secondly, the Rega Brio R is highly praised in lots of magazines and on forums, but it wasn't for me when I auditioned it, and much prefered a Rotel (not the RA 10) - for my ears the Rega was a diffuse pile of dung. That's why everyone says you should audition for yourself instead of following reviews and opinions blindly.
Thirdly, stuff like Arcam A19, Creek Evo 50a or Exposure 1010 (which are normally out of your budget) is worth looking into, because your dealer might have an ex-demo one for sale for way cheaper then what they normally go for, so it never hurts to investigate into it.
goodluck