Yeah I got a 1800 graft transplant, but I had it all in the front and sides, left the back, so I still have a thin patch there. I'm 5 months post op now and the transplanted hair is growing, I shaved my head to a grade 4 all round and looking forward to more growth.
The Doctor suggested leaving the back for now, and I preferred to redefine my hairline, I'm a NW3V, V for vertex thinning.
I'd get on the propecia as you will be advised to use it if you get a H/T anyway, best to see what that can do for you before getting surgery.
I had minor side effects when I started for 3 weeks, nut ache, watery seaman but it went away. Been on it for 7+ years, had a spell a few months ago where I struggled to get an erection, and was thinking of quitting and thought it was because of finasteride, but it went away on its own and i've had no problems since, so probably a case of wanting to blame finasteride because it's the obvious culprit, but I know now it was just due to stress.
Propecia is not perfect but it is the best drug we have, serious long term side effects are rare, they can happen but the odds are against it.
Back in 2002 when I was trying to put together a regimen it took me months to decide to finally get on finasteride, I didn't join this forum until a year or two later cos some of the negative propecia posts scared me shitless, although I was more worried about it not working than giving me side effects.