I need a new seatpost (currently on a **** single-bolt ritchey that slips, no matter what I try). I'm considering an American Classic titanium for the (reputed) ride quality, the lengths it's available in - frame is steel semi-compact, and the AC clamop has about the right setback. Campag ti posts are too short (and probably too light). Any thoughts? I'm about 240lb - so should I consider Ti or just suck it up and buy a setback Thomson?