If you can add 50 more euro, you'll be able to get a Radeon HD 7950, which is going to benefit in much higher performance compared to the Radeon HD 7870! In terms of the future, the 7870 is going to become obsolete a lot before the 7950, so think wisely.. Those 50 extra euro might provide you with 6 ~ 12 months of longer GPU life as of high-end gaming.