I dont see what was wrong with the OPs first thoughts. Dump both the 9600gt's and get a gtx750ti. (or even a 750 non ti)
save nearly 100watts at idle (and in everything else he does) while having significantly more GPU power. You say he still uses the PC several times throughout the day and he isnt really wanted a complete upgrade. Why bother?
Go with your first thoughts, in the OP. Swap out his 9600gt's. It is a simple and very effective solution with no drama and takes very little time.
save nearly 100watts at idle (and in everything else he does) while having significantly more GPU power. You say he still uses the PC several times throughout the day and he isnt really wanted a complete upgrade. Why bother?
Go with your first thoughts, in the OP. Swap out his 9600gt's. It is a simple and very effective solution with no drama and takes very little time.