With the teste pain, consider a recumbent? I am having prostate issues, and it makes a world of difference. Don't buy new, get used for 20-50% of new. Take your time and scan craigslist a few times a week or more.
Recumbent bikes are a dying breed, but tons out there used. .Tadpole trikes are the latest fad in recumbent,
I just scored a 2002 Rans Stratus classic for $300 with tons of gear to go with it.