Does radiation affect the reconstruction process?

I'm feeling a bit rushed and I need some input on how radiation (6 wks) will affect my reconstruction. A bit of background ...

I had my lumpectomy on Dec 8th and I was told that I could do 6 wks of rads or have a masectomy ...my biggest issue from a cosmetic stand point is that a year ago I had breast augumentation (I'm still so angry that I waited forever to make these boobs pretty, spent so much $$ and then this happened). The RO has advised that there is a strong probability that capsular contraction will happen as I have a fairly large implant and very little of my own breast tissue.

I've had to wait forever (7 weeks) to see the plastic surgeon that my BS works with. I see him on the 12th and my radiation set up is on March 16th so basically I have 3 days to decide what I want to do. I've had people ask me why things aren't moving faster...it's so frustrating. At this point these implants have lost all their sparkle ...I'm not even sure it is the best route and have been reading about the DIEP flap.

We just bought a vacation home in Costa Rica...I wear a bathing suit a lot. I just want the very best cosmetic outcome (without going smaller) my BS also said that this PS has an 8 month wait list for non immediate reconstruction ...that's insane!!! I'm afraid of having the radiation and then being told I will have to go smaller. I lived with barely B's all my life...I want to keep these D's. Sorry if this all sounds so shallow..it's just that my boobs have always been my "nerve"...they were finally fixed and now I'm stepping backward. It all just bites.