I need a fairly quick question answering...... Im looking to buy my 18 year old lad an imac for xmas, I cant afford a new one and hes happy with a second hand one, my budgetis absolute max 600 but thats stretching it a bit, ideally 500.. now I know im not gonna get a new retina screen for this but my question is, will an i7 with a 512mb VGA card be able to handle the stuff he needs? Basically hes using logic, photoshop and other softwares for music... Hes doing graphic design at collefge and is in his 2nd year so its getting heavy now and hed like to be able to do some work at home. Hes also very keen on making his own music with guitar and keyboards mostly. I have been offered this mac here for 500 and I think i can get it down to about 450-475.
http://www.ebay.co.uk/itm/2223263000...%3AMEBIDX%3AIT

Could someone tell me if that would be OK and is there some scope to upgrade in the future like video card ? I know the Ram can be upped but im just not that well up on MAC.

Many thanks lads.
Paul