We had 24 inch blades on our 2002 Marquis when we picked it up from BCS, they looked like new blades and they worked quite well. As a maintenance item after 3 years I replaced them having learned that 28 inch were possibly the original size but they do not wipe the surface as well from the time we put them on. Just not enough pressure along the length of the blade to follow curved areas. If I had to do it over I would go back to 24 inch unless there were good reports that 26 inch also work quite well. These current ones are Trico from O'Reilly if I remember right. The 28 inch Boomerang may be the solution if you did not mind the cost.
Joel, I think that you posted using 26 inch, how do they do at following the windshield curves?
Later Ed