The 2500 gets my interest from time to time but I always remember that the 2500 is 10 year old technology and the E-TRAC is about 1 year old technology. Maybe Garrett and Tesoro will soon come out with something new that will be a step forward, I hope so. IMO, the three most advanced detectors and also the most productive are in order according to my opinion, (and I have all three)
1> E-TRAC
2>F75 LTD
3>White's V3
The ET and the LTD are both easy the learn, the V3 isn't, IMO, and actually I am no longer sure which of the first two, the ET and the LTD are most productive. They are both excelletn, deep, and they don't miss much... BUT... unless you only hunt the same beach or the same site over and over no one detector is going to be best. The ground minerals, ammount of trash, type of trash, and EMI all work together to thwart one machine and allow another one to shine. The V3 may well be the one that will work well in the most places because of all it's options. I like to have a choice of machines myself. I usually carry at least 4 with me all the time and at a new site I almost always use more than one... i've been to too many sites where my detector of choice just wouldn't do the job.
Of course I didn't buy all my detectors at once but over the years I acquired them. I've sold a few but kept all I really like.
That is my advice, FWIW. At that price point I wouldn't buy 10 yr old technology.
Julien