At 6'3", with large boned frame, 200/198 is perfect for me. I'm a bit above that right now as I drop from a high of 225 lbs closer to 215. But, I have read more than one chart that says I ought to be weighing 180 lbs or so.
My dad, who at 67 is retired and rides 50 to 75 miles a day minimum (every day), weighs 205. That man has not an ounce of fat. Go figure!
BTW: those same stupid charts insist that boney-looking Obama is in the upper range his ideal weight. That is just crazy.
To cut through this insanity: I go more by the waist size, using the weight thing more as a barometer than as something etched in stone. I aim for 34" on the waist; find that I can live with 36"; start working harder when I hit 38", and make damned sure I never reach 40".