I think either detector will do fine. Here is a little of what to expect from both...remember I know the dfx a lot more than se...but I'll give it a shot...
Dfx first....
pros
has a very fast response time, which is great in trash especially with a smaller coil such as the Eclipse 5.3
Depth meter reads in inches
Pinpointing a breeze...you can simply hold trigger in and when bars are exactly in line at shallowest reading...dig! Also trigger can simply be pushed forward in pinpoint mode.
Tone id
Wide variety of accessories such as coils, covers and so on.
On screen icons which are helpful at first can be turned off also.
Accessories are reasonably priced.
Cons
The dfx does have problems with emi, you can try one frequency or lower sens. but often dfx does simply not want to play!
Personally running the dfx and se side by side, air tests, ground tests, the dfx on average coin size objects expect 5-7 inches,,, I hear a few claim more...a very few... I received at least 30-50 private letters of people trying every program and still maxing ou there.
Now the se Pros
Depth..without a doubt the se is deeper...I have air tested to 13 inches and had targets already at 10 inches...
I like the design and balancing..
Tone id
Less digital numbers make for easier target id
Quality
I changed to the 8" Minelab coil and pinpointing seems much better
Cons
The pinpointing can be a little difficult because if you set detector down in pinpoint it starts blaring out sounds...so simply depress when you set detector down..my head hurt just writing this!
The depth display does not show inches...just a black bar.
Accessories as well as detector very expensive.
I swing both usually each hunt... Up to now not a solid opinion but the dfx responds faster, and picks up jewelry easier... The se has me digging deeper holes... When I clad hunt it can be very close...but usually dfx gets the nod...slow hunting and fighting off emi se wins there...remember I do not have a lot of time in with se so this can change...this is just personal opinion and me trying to be honest...hope it helps you decide...Good luck! Gregg