I had my BA in January, really really happy, have recovered amazingly and had no trouble at all.
I am now at the stage I want to wear underwired bras (was desperate to get out of the unflattering sports bras & no underwired bras).
Went to Bravissimo last night to get measured, very happy with the size – I am between 28G & 30FF depending on what style bra I have!! 
Anyway I found 2 amazing bras which felt great, not sitting on my scars at all and feel really supportive but I have found that I am still getting the strap marks dig in and the cups are still leaving slight marks on my breasts.
It seems like I just cant seem to find the right solution, does anyone else have this problem? I wonder if I will ever find a bra that fits me perfectly and leaves no marks all over my body. The bra feels great except for that but the red marks under my arms are not good!
Any tips or anywhere else I should think about getting measured?