Rather than listing all individually and taking up loads of threads will list some in 1st post. Code will work on all over £50 and can be collected in store with Clubcard Points as well.
The one in the direct link seems a good buy with top reviews and extremely cheap compatible Ink Cartridges available but others might be more appropriate or better value. Also, with the one in direct link you can get a Free 3 Year Extended Warranty when purchased with any qualifying Epson multipack of inks. (Link with T&C in 1st post) - Available for purchases between 1st February and 30th April 2011.
PS - Code will work with anything on site over £50 - If something priced at between £45-£49.99 just add a cheap item at £1.00 eg, sim card to take over £50 and apply code.
Possible Quidco also available.