What a bunch of bike weenies on here. When I rode my last century, I was comfortable for most of the ride, but fatigue (I don't care what you say, riding for 5+ hours will fatigue most any body part) set in and I found myself resting on my elbows intermittently just to change posture. Yes, I understand bike fit, aero position, stability, handling blah blah blah; but truth be told I was WISHING I had stopped listening to the cycle groupies and just went with what was comfortable because in the end it was me who had to ride the century and it was MY comfort. Anyway,OP, if your concern is just for shifting around for comfort as you said -- get the aerobars, just get some light ones because lugging an extra 4-600g isn't fun for 100 miles