knafelc Finding the right boat for you shouldn't be too hard.  The stickiest point may be the bow/stern rise.  Wenonah 15' Prospector has slightly different rises, but I don't notice that much.

Any decent tandem shouldn't have any problems with your weight & size.

I made one modification to make solo easier.  I moved the bow seat towards center about a foot.  Makes it easier to heel and trim.  Makes tandem a little more trouble, but only my elitist paddler friends have mentioned that.