I've had a 10lb and a 10lb 12oz, both c-sections. With my first I was hoping for a natural birth in the birthing centre - that all went out the window when my blood pressure went sky-high during labour. Ended up on the labour ward, I had an epidural (it was amazing) went through the whole process and even got to the point where I was pushing but she just wasn't coming (might have been the epidural affecting things) and then her heart-rate dropped so it was an emergency c-section for me.
For the 2nd, once again I was hoping for a natural birth but when my blood pressure started creeping up in late pregnancy we opted for elective c-section as it was looking like I'd end up going down the same route as the first and figured that an elective c-section would be safer than an emergency one. I did feel guilty about this initially, but with hindsight I know we made the best decision for us.
Please don't put too much pressure on yourself re: birth plans and how you want things to be. It is lovely that some mums are able to have a natural birth with no pain-relief etc etc, but the most important thing is that your baby arrives safely and that you are healthy too. I know of lots of women that are still, many years down the line, annoyed at how their birth experiences turned out or feel guilty that, for whatever reason, they were unable to have their baby the way they wanted.
Is this your first baby? I managed to breastfeed both my children (for over a year). I did find it very hard to get started with my first child, but I don't think that was a result of the c-section as with my 2nd I knew exactly what I was doing and we just got on with it. Hopefully you will have a lot of support if you want to do this, I nearly gave up but our health visitor was amazing and kept checking in on me long after I should have been signed off. I've never had a natural birth, so can't give you a comparison but I can say that c-sections are not as scary as they seem, and i have recovered well both times (tbh, I think pushing out 2 babies that size would have caused me much more damage than having a section). I'm now pregnant with twins (hopefully they're not going to be 10lb-ers!) and will be having a 3rd section to have them.
And on the plus side, I found that both my mega-babies were great sleepers pretty much from the start! You just get them tanked up on milk before bed and they were sleeping for much longer chunks (I guess because their tummies are bigger too!)