I'd highly advise you go to the highest tire size your frame will allow. I'm betting a 28c.
You'll enjoy it alot more, it won't be nearly as harsh and you can run lower pressures. I think it might make you faster too, I use to ride 23-25C at 220 lbs and it use to sap my energy alot, the constant vibrations and buzz from the road killed my legs and made everywhere harsh.
at 200 Lbs with 25c Tire it was still harsh, so i'm now running a 32c Tire at 180 lbs.
You'd enjoy it alot more if you upped your tire size. Even 2mm is alot more comfort, but trust me, i'd really recommend you whack on 28c tires. Make sure your frame can accept it though.