I might try a long high rise stem before a short one, any additional rise will tend to reduce the reach to the bars, while super-short reach can be deceptive and wind up with you putting more load on your wrists. Also suggest moving the saddle back if your back is complaining at holding your upper body up.

I'd also look at "moustache" handlebars, they are the same diameter as road bars, so you wouldn't need to get different shifters and brake levers, but they're more upright.