I was tempted by the Argos deal posted earlier, but have some Currys vouchers and O2 Priority, so thought I'd check there. This is similar, and was posted a month or so ago for £289.99. Yes, this has the AMD processor rather than i3, but the extra couple of GB RAM will help in that respect.
Also, if you can get O2 Priority Moments, then by spending another £30.01 you'll effectively get that for free with the £30 off £300 voucher. I added Office for £39.99, so will end up only paying £10 for it.