It may not be great, but when you're on a 700euro budget to replace the entire system, its doable, especially since that computer's already at 698.90euro.
OP may not be in England, which means additional fees for shipping, taxes, and duties if he were to order from the website you posted.
I know what thats like - ordering parts in Canada is absolute hell. Order from newegg/newegg.ca, and you pay additional taxes, duties, shipping fees. Order from NCIX (out in BC), the prices are more expensive, but there are no duties, you pay less taxes, and its MUCH less in shipping fees.