Digital BW, The Print

Hi folks,

OK it's time for me to get a bit more involved in curve making, etc. 
in B&W printing. I've been eyeballing it for some time and am pretty 
happy with the results I am looking for more control over the prints 
through making my own curves.

I'm requesting a bit of mentoring in densitometers.

I'm mostly a film shooter, I scan the negs in to print. I'm using a 
2200 and QTR, I am using an MIS Ebony cart in place of the standard 
Epson black and it's great (Thanks Paul R.) however I need to refine 
it a bit.

I've never messed with them but I see many densitometers on eBay from 
60 bucks on up. What's a "good" densitometer? What brands are 
acceptable (I know, lots of opinions there)?

Thanks for any thoughts that you are generous enough to share.

Jules