I also had an em cs which wasn't really emergency at all - you're monitored and the situation is discussed all the way through the process (failed induction as DS was tied up in his cord, it turned out), but was all very calm. The only thing I would say about elective over emergency, is that at least with an elective, you won't have messed around for x number of hours and be exhausted before the baby arrives ...
I don't think scans are particularly accurate on size, I've never found them to be, but ask your consultant. It is head size that matters I think, so see if they can measure that on the scan.
Is this your first baby? My recovery was fine, the only pain was not being able to drive for six weeks, when I felt fine after two really - more of a pain not being able to drive if you have to ferry a toddler or older about.
What is your family history of baby size like? I might be up for another cs as they think my DS was large - 9lbs 10 - even though I keep telling them that in my family, he was pretty average!!
Up to you really - you always have the option of the em cs so you might like to try for a natural birth - though for breech, I did think that cs was standard these days.
Hmm - not much help, really, am I?!!
Have you heard of Optimal Foetal Positioning, might help to turn baby - look at www.spinningbabies.com - lots of scrubbing floors in the next few weeks!
Also, if you do have a cs, use a nice big fluffy pillow to rest the baby on for breastfeeding, to keep him/her off the scar - no pain.
Let us know how you get on!