I run 700:28 Marathons on Mavic Ma40 rims laced to a Sansin 40 spoke hub (front) and a 32 spoke Deore in the rear.
These are solid wheels and at 90 psi the Schwalbes such up the bumps really well and the wheels have been bombproof... the MA40's were the preferred choice for many tourers as they are such a solid rim.
And I can still roll out at some pretty decent speed... I run 700:35 Schwalbe Cx Compes on another wheel set for winter riding and these are downright plush.