Advice on performance 200X cam

[Xfile]

I'm down to the last part I need before I tear down my stock 200X engine....a performance cam. Could anyone with experience give me some advice? I'm looking for the most bottom to mid-range possible and just a decent top-end....most of the riding I do is in the bottom-mid range so top end isn't that important to me. I will be using a mildly ported cylinder, a 29mm kiehin carb w/larger intake, and a 10.5:1 piston. I have also installed HD valve springs and retainers. I'm looking for a cam I can still order new like a web, megacycle, or powroll. Thanks in advance for any help! Also...if anyone has one sitting around that would work well for my application, I'm interested in buying.....This is for my 85 (pictured)