instead of M&S or Debenhams or somewhere similar, how exactly will it improve my life sufficiently to justify the expense?
I've been thinking of treating myself for a while. I've fitted myself using the guidelines on here but I'm still not 100% convinced I'm wearing the right size or that my bras are as comfy as they could be, but to kit myself out with R&P bras for all occasions will cost me £500+ 
I measure myself as 32C and wear mostly plain t-shirt bras that don't show under clothes, or sports bras (for sport!)
I could do it but how exactly will my life improve if I do?