Merchant account - web payments.

Anyone here have a website that can accept CC payments? what merchant do you
use and how is the cheapest?

Are there any advantages to using a bank account from the same company?

i.e my normal bank account is with Natwest and so any business acocunt i
would consider would probably be with Natwest - but I am looking at Barclays
online payment processing - would it be better if my business account was
with this...

The system I want will be, user logs into their personal account, chooses
what they want - the system then adds it all up and they are then sent to a
page to insert their card details.

123-reg have a similar system, where you choose a domain and then a little
box comes up and you pay - all very ncie and tidy - i don't want something
which takes to you a seperate page (whci hi have a feeling barclays might
do)?

thanks!