seems good value with 12gb ram and i7 processor @700£ but the graphic card seems underpowered for my current screen (dell e228wfp), could anyone recommend a better budget one or computer system hopefully not to expensive
The video card will run any monitor, you wan to pick one based on what you want to use the computer for. The i7 built-in video is not bad, it's way better than the old Intel video, but is bellow the lowest "gaming" video card. About on par with a $40-50 stand-alone card. Enough for HD video for sure and for some games at lower settings or older games.
If you want to run two video cards, should up the power supply by another 100 watts. 550 may be enough, but may as well get a bit better and not have to buy a whole new one later if there are issues.