iPhone 5S Space Grey 64gb O2 £769

Anyone else wondering should i go large or small? 64gb & 8gb data per month could be worth it in the long run...
O2 website says "the more you pay today, the less you'll pay each month."

Kind of makes me want to pay all in one go, then not have to worry about high month line rental.

iPhone5s Black Handset
+ 1 to 8GB Cellular Data
+ Unlimited Minutes
+ Unlimited Texts

Cost per month
8gb £27.00 * 24 = £648
1gb £17.00 * 24 = £408

Total: £1177 (avg £49pm)