Lulu - is there any published research comparing a (hands off) vaginal breech birth and CS? I dont' remember coming across anything when I've looked, but I don't have access to a lot of the literature so that doesn't necessarily mean anything.
As for what is best, it very much depends on what medical resources you have available. NICE guidelines currently recommend a CS, or a vaginal breech extraction (Dr led, forceps, mother on back, in stirrups) - they do NOT recommend a breech birth (MW led, mother on all fours, hands-off the breech!) due to lack of experience within the NHS. There are some pockets of experience so it's worth asking, but even if your local PCT has MWs with breech birth experience being able to birth your baby that way may turn into a fight against hospital protocol.
Everyone has a different experience of ECV - for some women its agonising and for others its merely uncomfortable. If you do go for it, remember you can ask the Dr to stop at any time. You could also look for a Chiropractor experienced in the Webster technique, which has quite a good reputation for helping breech babies turn.
Try and get hold of a copy of "Breech Birth" by Benna Waites and/or "Breech Birth: What are my options" by Jane Evans.
DD was breech from about 28 weeks. I wound up having her as a breech baby at home with IMs. We declined an ECV attempt. That was the right decision for me and my family given my circumstances (I was lucky to be able to find IMs with the experience that could take me on at 36 weeks - otherwise I'd have been signing up for a CS).