The Etrac outclasses it by far. If money is an issue you won't be dissapointed with the 2500 it does work great and is very easy to use and understand. The Etrac takes alot more time to learn, but will still satisfy out of the box.
It really depends on how you hunt. If you hunt in a iron trash site, of the two you mentioned go with the Etrac.
If you utilize the screen more than sound, the 2500 is much easier to read and understand right away.
I loved both, I recently "downgraded" to a Gold Bug DP, but when I can afford a top machine again I will be purchasing the Etrac.
Hope that helps, it was kind of general if you have specific questions I might be able to help.