Clearaudio Aurum Beta S vs. Denon 103R

Yes, do the wood body on your 103R. There is some pretty compelling info at the vinyl asylum (just do a search there using aurum beta and audio technica) suggesting the Aurum Beta S is nothing more than a slightly improved AT 95.

My guess is that a $69 AT 120E would equal or better the Aurum Beta S.

I am not sure you'd consider it an upgrade...if you 'love' the 103r, why change it?
Something interesting would be to mod the 103r to p[ut a wood body onto it, like here:
http://www.theanalogdept.com/images/spp6_pics/Classifieds/Uwe%20Bodies/Bodies3-1.pdf
there is a review here:
http://www.audioasylum.com/cgi/m.mpl?forum=vinyl&n=694577&review=1
I would seriously consider something like that rather than going to an MM cart (especially when you like the MC)