I was on the 'phone yesterday to the Dell help line but I think I was talking to Penang in Malaysia!
I have found with Dell it pays to contact them by 'phone and simply say, "I want to order a new computer". That way I get a dedicated sales person, I have their name, extension number and a reference number, we then go through the basic config as shown on the internet but changing those bits I want to change, afterwards I get an email to check the config and reply to, one more 'phone call to arrange payment and that is it.
Maybe I have just been lucky but I have always found Dell to be pretty good.