Arcam CD73t or Rega Planet 2000

no such luck with someone carrying all three ...

why the cd72 , as opposed to the newer cd73?

I have heard some say they like the sound of the 72t more than the 73...

I cannot verify that, but I can say that I enjoy the sound of the 72t tremendously.

I have had both in my system.
I do not think that the Arcam 73t is more 'detailed' than the Rega Planet 2000. I think that the detail levels they retrieve are similar, but that the presentation of the Rega is subtler and can give the impression of 'less' detail. Be sure that you have enough clearance for the top loading rega if you go that way.

When I was auditioning the 73T it was a fairly balanced player, except we found a few audio tracks where it utterly fell apart. Namely, anything at the top end of the frequency spectrum. I'll link to my original roundup on Audio Asylum so you can read in detail if you'd like.

http://db.audioasylum.com/cgi/m.mpl?forum=digital&n=85793

Here is one more to consider,even if you just went and bought just for a quick listen,you might be amazed,Arcam cd92 or a cd23,with the ring dac.I preferred it over the cd 33,actually it was quite easy.