The i5-750 is generally the best value for the money for the current Intel chips. It is also LGA1156 instead of LGA1366 which means the selection of motherboards will be cheaper as well. Also LGA1366 processors are triple channel so you will want either 3 or 6 gigs of ram. 4 gigs is fine for the LGA1156 processors as they are dual channel.
As for a video card your resolution is quite high which requires a powerful card. Basically at that resolution an HD5850 would be great, and an HD5770 would be good. An HD5750/HD4850/GTS 250 will be ok if gaming isn't really a priority and you can live with medium settings on the more intensive current games. For one of those I would recommend getting a crossfire and/or SLI motherboard so you can double up if/when you decide it is necessary.