If OP is planning to upgrade monitor soon (or even in a couple years), the upgrade is worth it. Sure, 4GB VRAM won't be completely utilized, but I don't see a single reason of not going for it, it'll max out any game, yep it's a bit overkill but then people have SLI setup for single FHD just for the extra frames, is that not overkill? A less powerful GPU may max out games on this reso, but thinking of upgrade in future, he'd need to upgrade GPU too, to max out titles on FHD, not worth it IMO.