yeah you could probably use an upgrade from a gtx460 for playing modern games at 1080p (same as me)... i like my gtx660 that i got for $205 but you can get something like a 660ti thats a bit more future proof (wasnt worth the extra $100 to me)

radeon 7870, radeon 7950, geforce gtx 660, gtx 660 ti all great choices in the $200-300 range

also, all three of those monitors are TN based so terrible IMHO.. i would go with the planar since its the cheapest and it looks like all three use the same low end TN panel and cheap stand so go with the cheapest