dioptrx question

I'm thinking of getting a dioptrx for my 27 pan--I've got about 2.25 diopters of astigmatism. My question is, should I really go for the 2.25 diopter or scale back to say 2.0? Reason I ask is because someone, I think maybe Kim Colter, reported having better results when he backed off a quarter diopter from his prescription. Any thoughts from you more heavily astigmatic types?
thanks!
geo.

If anything, you should move up in correction...not down! My left eye is 1.75 and my right is 2.00...I have found that the 2.00 actually works better than the 1.75 for my left eye. I now plan on buying the 2.25 for my right.