I find the FX fine for my riding, which is like yours without the curb hopping, since I don't ride on sidewalks. You could make a big difference with a tire change on your current bike.

I don't know how large a tire a 7.1 FX can handle, but my 7.3 FX came with 32 mm slicks, and I am currently riding Clement X'Plor USH 35 mm tires and they ride wonderfully on whatever surface I ride, usually rail trails with crushed stone, gravel and a few wooden bridges. I was able to squeeze on a set of 40 mm Kenda Happy Medium (60 tpi model) but I had to deflate the rear tire to install or remove the rear wheel, they were also very nice to ride.

Depending on how large you are, you may also be able to just lower the pressure in your tires to get a smoother ride. The maximum pressure on tires is not necessarily the ideal pressure, unless you are an exceptionally large rider like me. Even though I inflate to maximum pressure on the rear tire because of my weight, I keep my front tire at about 90% of my rear pressure in order to help cushion things like gravel and wood bridges.