Your choices are completely different beasts.
As Lonerider stated, the Evo is a park board. Yes, it is a bit long for your weight especially if you are park focused (rails/boxes). If you are hitting mainly jumps, then your Evo should be just fine. Heck, it should be just fine for hitting features as well.
As for the sluggish turning, what boot and binding combo are you rocking? I noticed that a lot of times, a simple upgrade in bindings or boots takes care of handling issues. Too often I hear people complain about sluggish edge control only to find out that they are using a soft pair of bindings and boots.
Since your riding is a mix (all-mountain freestyle), your bindings should be at least mid flex optimally.
So your boots and bindings are fine. Alright, now let's look at the boards then...
The DH2 is a STIFF monster. I'm talking "good luck pressing that beast" stiff. However, it is easily one of the poppiest boards around. Load, release, and fly poppy. Micro camber between and rocker out. Oh yea, it's also stiff. Great park board if you are going to full-speed every rail in sight. Great park board if you are going to hit kickers and pipe all day like a boss. Long story short, you better know what you're doing if you want to take this into the park.
The Proto CT is the better choice for you. It's way softer than the DH2, but stiffer than the Evo. Rocker in between, camber starting outside the bindings. Lots of pop (DH2 still rules here). Plenty damp while remaining just a little less lively than the Evo. The Proto CT is truly a one board quiver. It's going to handle everything you throw at it well.
As everyone else said, you have plenty of other options. If you want a board from Ride, I wouldn't consider anything else except either the BuckWild or Machete (not the GT version).
From Burton, the Joystick is a great option.