pink -
at your coat losing DS - I had one of those (he's still like it, but it's his partners problem now, not mine!) Great that you are heading rapidly towards the end of rads, and also that you didn't get nasty woman again.
BurningBright - lovely to see you
- and actually really good to hear you are at the stage when you are ready to have a reconstruction.
I can't help with the was it worth it questions (I think Smee might be the girl you need), but I have just set the wheels in motion to have a recon. - waiting for a surgeon appointment, so very early in the process.
I have had a lot of the same thoughts as you, - wondering whether to put myself through more surgery 'unnecessarily', and its taken me a long time to make up my mind that this is the way to go.
Ny thinking really was that I wanted to move on from this experience, and I didn't feel I could do that when I saw my mastectomy scar everyday. It didn't used to matter to me - all I was bothered about was getting through the cancer treatment. But now there's a bit of distance from DX, I feel I really want this.
I totally get what you are saying about the fear of it going wrong. Of course its an incredibly slim chance, but its natural to worry about these things, and it's hard to reassure apart from quoting statistics. They don't really help the way you feel though do they? 
It sounds as if you do really want the op., and I would say its an op. that's about so much more than simple vanity, - its all about who you are, your identity and how you feel as a person. I personally think you DD will benefit from you feeling more confident and more comfortable in your body. But its a tricky one (nothing comes easy with this cancer lark does it?)
I think talking it through with your BCN or your consultant is a good idea, - even if its just saying your fears out loud.
Are there any recon. support groups near you. We have one called 'keeping Abreast' - they have a website which I'll try to find for you in case there's anything helpful. Its local unfortunately - would be a lot more use if it was countrywide, because I think they have a lot of women who've been through recon. who will come to talk to groups, show off the results etc.,
Anyway, I wish you the very best of luck with it - whatever you eventually decide, - I think a bit of panic and cold feet is very natural, and I'm pretty sure I'll go through the same when its nearer the time. Lovely to see you, and know you are doing well 