Orc is good, don't get rid of it or stop throwing it by any means.
Wraith will be a little faster, drives forward well and is solid in all 4 plastics it's made in. Champ is nice and OS, Star solidly stable, Pro/DX have some turn and still keep the fade new yet beat into nice neutral/understable discs.
PD, can't go wrong here. PD is to the wraith what the Teebird is to the Eagle. More HSS, touch less LSS. Straighter lines, less flexing ability. If you play wooded courses that need some tunnel shots, pick this one.
Speaking of which, Teebirds and Eagles are great too.
For stuff a little less stable than the above drivers: Volt, Viking, SL ('Pro Starfires' are SL molds btw), Saint, there's lots you get the idea.
That all being said, do yourself a favor and grab a Champ/Star Sidewinder (or something you like in the same stability range). These babies work wonders and are just effortless. I used to drive mostly XCals and other such big time OS discs, and while they are nice sometimes now for big flexy max distance shots or the occasional 90 degree doglegs, when more neutral stuff is your bread and butter it's much easier on the arm/smoother/more relaxed. It's a really nice feeling parking a sidewinder 300+ from a nice easy one step throw, and multiple rounds are a breeze.