So unless you intend to play tournament speedball at the highest level, and your skills are to the point that the only improvement you could make is getting a better gun, the $1000+ markers are not worth the money.
This is the best way to sum it up. People spend a ton of money on stuff with little additional performance for lots of reasons. I don't know them, but keep in mind they are using the same "illogic" that a guy is using when he blows an extra $400-$500 on A5 or X7 upgrades to the stock or rail just to make it "look cool".
I used to shoot a Spyder. Got tired of getting outshot by electros despite my skills being equal...so I upgraded to High End Mechanicals. Recently, ran into the same problem as I started getting outshot by electros so I'm making the transition to Mid Range Electros.
Now, can I see the point where I'd ever buy a new marker, much less a new $1000 marker? Absolutely not. Just like I don't buy new cars. The markdown is so high as soon as you open that box, that there's no point to it. Why pay $1300 for a new DM when you can get a 09 or 08 model with upgrades for $600-$700?
But...I also can't really "preach" too much because I've invested a ton of money into multiple markers...when in reality, I only need a couple. So us gun whores are no better.