no dont make that big of a drop, the 550 ti is a very good card and as far as i know, the 450 is a long way off of it, like i said before you could always get really cheap keyboard and mouse from tesco.. they are pretty good as well, i used to use mine all the time and you can click pretty fast on it too, havent got a keyboard from there though, you could also get windows 7 elsewhere for a slightly lower price, although not really that much