DovyNorris :
Im just looking to run games at mid to high settings but I did see a windows 7 pro license on ebay for around £27
I will give you the lowdown on that.
They are 'recycled' licenses. Somebody has phoned up microsoft and said they are replacing the motherboard on a machine they found at the tip and persuaded microsoft to re activate the licence.
It is a bit 'iffy'.
Check the feedback. Usually somebody gets stung with a cock up at some point and it may be you.There are many ways you can get stuffed by these sellers,its dishonest to the point of illegal in the first place.
Better to buy the first machine and upgrade the card later,its gonna cost you about £60 after you have sold the 750t.i. for £80.