I was thinking of a DFX or a Minelab but ended up getting a Garrett GTI-2500. In fact, I ended up getting my detector in a swap; got a lightly-used one for $200 cash plus two nice coins. Considering what I had invested in the coins, I ended up getting the detector for less than $500. If I had been paying full price, in cash, would I have still chosen the GTI-2500? Not sure. It was one of three I had narrowed my choices down to.
The Baron does have a point: for 1200 bucks, you could still buy two nice upper-middle-of-the-line machines and sell off the one you didn't like, or have a secondary unit. Perhaps $600 for a nice detector and another $600 for a specialty machine (surf/dive machine, gold prospecting machine, whatever).
PS- if you want lightweight, forget about the Garrett GTI-2500. It's a nice machine but it's a cinderblock.