I have back and neck issues, so I don’t really want a super aggressive position
I do not know much about the Jamis Renegade Series but I'm about the same size as you.What model are you looking at and why does the bike shop thinks A 61 cm would be better?
61 cm is big.I think you got it right with the 58cm. 620 stack / 396 reach is A good
geometry for A endurance bike.With your pains I would look for A shop with A good
bike fitter. Jamis are very nice bikes,but I would not pull the trigger to fast on this one.
And welcome to BF forums.
Jamis Renegade owners