Thanks for your reply...I ordered a DA brake caliper as I think it has better clearance. When I had the 25mm Conti's my only concern was the brake caliper, chainstays seem to be OK. I'm not a "powerful" rider more of a spinner.
When I had the 23mm Conti 4000s II, I had about 2mm of brake caliper clearance, currently only have less than 1mm.