I ONLY ride on paved bike paths, and occasionally on the road. I currently own a trek 4300 alpha that now has 26x1 road tires. This bike is ok, but I run out of gear when I get around 23mph.

What im looking for is suggestions on a road bike that is in the 500-800 dollar range. I am 5'9, 190lbs.

I apologize if I don't use correct terminology, im definitely a noob when it comes to discussing bicycling.