One nice thing about a seersucker suit is you can wear the jacket as a sport coat without looking like a cluck. Same goes for the trousers, now that I think about it.
One of the guys on Ask Andy said this combination is almost psychedelic. It's been a while, but I get his drift.
The oft-maligned Jos. A. Bank is selling a three-button darted/plain front seersucker suit for $99 (click here). It might be worth a try, especially if you have broad shoulders.
The jacket pictured here is a vintage Brooks Brothers wash and wear three-button sack, a much better fit for the slope-shouldered.