I agree with some of the replies. Tires are a good choice and ++1 on Conti GP 4000S II, especially 25mm or higher if you frame will accommodate them. But I think a good set of wheels will make a huge difference. My Orbea Opal came with mavic ksyrium elite wheels, when I upgraded to HED Ardennes FR wheels the difference was night and day, lighter, stronger, wider (23mm OD) which translates to more comfort and better handling, as you can ride lower pressures. However the OP at 225lbs going too low puts you in pinch flat danger.

The newer Ardennes and Belgium 25mm rims would be a great choice, the Stallion build with more spokes is what you want coupled with 25 or 28 mm tires. My new HED Ardennes SL Plus 25mm rims the 25mm Conti GP4000S II measure 28mm. Can't say yet how the new wheels ride as they won't fit on my Opal. The new SL Plus I bought for my a new Orca I haven't received yet.
That's my .02
John