I have Psoriatic Arthritis and have several bicycles. My favorite bicycle is an older specialized crossroads hybrid setup for loaded touring. It has a Shimano BioPace crank which I have found is very easy on the legs and joints. I also have a road bike and use it for the roadie runs three times a week but it's painful compared to the hybrid bike. As for speed, when I do that I select the road bike but when I am out just ridding my bike I always take the specialized crossroads hybrid as I can ride it all day long without pain. My normal speed is around 12 MPH touring load with about 30 lbs of gear and 15 MPH loaded for a single day trip of between 75 and 100 miles and about 5 lbs of stuff. If I were limited to a single bike it would be the specialized crossroads hybrid setup for touring. IMHO, you have made the correct choice. Also, don’t be shocked when you stop taking all pain medications for your Arthritis.