Hey John,
I currently have the Stock 950 and the Big foot for my DFX as well as the Eclipse 5.3"DD" for trashy areas, but I really like my Eclipse 1400 "DD", which is usually my weapon of choice! She is a bit heavier than the stock 950 and the Big Foot, but has good depth and still pinpoints nicely! The 1400 is a bit more temperamental around high tension lines and I find that when you run the coil hot you need to start lower with your Pre Amp to ground balance, then once it's balanced bump it up, other wise it may not balance for you! The 1400 is a really nice coil and she will run hot in most conditions for you if you want, with a little coaxing! I got her from Santa last year and couldn't be happier with it! I haven't been able to get out MD'ing as much as I would have liked this year, but the little bit that I have, the 1400 has served me well, netting me a few nice finds on ground that I have definitely covered with the other coils before! Hope this gives you something to consider and with luck Santa will grace your DFX with a cool new toy! The down side to that is that you'll have to wait until the ground thaws to get to work! Anticipation is a real killer!
Good luck to you!
Obi wan Hep