IMO, I'd save the money and skip the slip on. Yo're better off with a programmer and an air mod of some sort. To keep it really cheap and still be able to feel a difference:
13 tooth front sprocket: $15
EFI Programmer: $200
New air filter: $30
Remove the airbox lid: Free!
As for the cam, it's a 5 in my book due to the not needing to change the valve springs. I wouldn't even think of touching the cam unless I had head work, higher comp piston, full exhaust, efi programmer and an air filter solution.
2008 TRX700XX, Yellow/Black, EHS Big 3, EFM Auto Clutch, DS650 Fenders, 13T, Shorty Clutch Lever, Rear Brake on Bars, Kenda Road Go/ITP.
2000 Polaris Scrambler 400, HPD Trail Mod Complete Package, V-Force Reeds, Mikuni Flat Slide Carb, Flexx Bars, HPD Stabilizer, Fox Podium Rear Shock.