I currently own both the DFX and Minelab SE. Out of all the wants you have listed I would give possibly 1 to the SE, and the rest to the DFX.
I give ever so slightly the best depth on silver to the SE. Truth is I have yet to find a single coin with the SE that the DFX can't find as well. I give the slight depth advantage to the SE because it forces you to listen closely to the sounds and mover very slowly. This style of hunting alone will net you deeper coins. It's easy to get spoiled with the DFX and become too reliant on target ID. You tend to get lazy and pass up targets that could be good.
I bring home more coins and less junk with the DFX. By far I bring home more jewelry with the DFX. For me the SE seems more difficult hands down than the DFX. The DFX is a turn on a go detector, where as the SE can be very confusing without a good bit of reading the manual and hands on experience.
Don't take this wrong because the SE is one heck of a deep detector, but it is my honest opinion that a DFX with a 6x10 DD coil will get every bit as deep and have a wide scan like the SE, plus the DFX has much higher ID resolution, lighter and easier to understand.
I'm being very blunt about my opinion because I was in the same boat a while back and could never get a straight answer. Because of this I had to but both so I could decide for myself. I'm just trying to save you some money. Of course I live in Kansas and your area may be different, but I honest feel for what you want the DFX would be the better choice.