I second the wide band 02 sensor. the color tune is really not going to be easy to make work in a setup with a digital camera. You could also get an EGT gauge but it's not as straightforward as the 02 sensor.

maybe we all should bite the bullet and go to the dyno every year or so and get a real good tune. I think that's what i'm going to do, just make 1 big trip to the tuning shop and have it all done at once, get it on the dyno and optimize the AFR, then align and set camber then tweak the ride height and corner weights, probably won't cost very much and then everything will be perfect.