Im planning to build my new core i7 system and my main goal is to fluently run MS Flight Simulator X, having seen the best performances are given from geforce 8800 gts or 9800 gtx /gx2 which are slightly out of date respect the rest of the system technology and more difficoult to find (specially with <=1gb vram). which graphic card would you suggest for the use? the gts250 has the same core of the above I've read, will it work well with fsx? and for the enclosure/power supply woud be correct an antec sonata with a 500w PS? or would be better to go for an antec perfomance one serie P182 with a 650W PS? Thank you in advance for the kind and expert collaboration.