I'm putting together a tri bike setup and I have a set of old 404's (clincher). I am thinking about buying an 808 for the rear and I'm torn between getting the tubular version or the clincher version. The tubular version is significantly lighter than the clincher. I'm afraid that I blow that much on a wheel, I should probably get the lighter version. My main fear with that is that I will only use the wheel 2-5 times a year if I go tubular whereas every now and then I'd probably use the clincher for a fast training ride. Thoughts? Is 200g really worth it?