Wow! Tremendous responses, thanks!! I do have the standard Systemdek profile arm.
One of the keys I found in the opinions was; "90% of close to prefect" is prefect for me! I don't think my ear or other equipment would know what to do with that other 10% anyway. So, I appreciate trying to get to that 90% with reasonable cost. It's so tough to figure out; do you spend the $1k on another tt, say a used VPI or take the $$ and invest in another arm, platter and see what that gets you, that's really the dilemma.
I've been tempted to get the acrylic platter, I've seen that for a decent price, so I may go with that. As for the Rega 300, I read some post where the person was complaining that it made the bottom sound too bassy and something else along the lines of vagueness. That seemed to run counter to many other posts saying the exact opposite.
As for the Denon 103r, that really surprises me! I thought that was a good match!! It sounded a lot better then to me. What does not match? I have a BK Pro 10 pre. I thought that the 103r was a match for a profile arm?
Thanks again and I look forward to learning more. I may entertain the RB300 and acrylic platter. Would I need a new arm board?