I know this is the graphics card forum but please bare with me while I explain I promise there is a GPU related question at the end 
So I recently asked for advice regarding purchasing 2 x 24" monitors:
Monitor 1 for gaming, just for fun not competitive BF4, Wow and Elite: Dangerous, so it would be nice to run everything at Ultra settings but to be honest its not a major priority.
Monitor 2 will be used for everything from underwater video/photo editing, (amateur use not professional/commercial film making etc), and general internet type use etc.
Gaming recommendation was a 144Hz of some sort maybe even G-Sync depending on funds,
Second recommendation was for a IPS type panel.
Great I thought I can start looking at relevant monitors yipeeee
Oh wait.... I was then asked what GPU I currently have, which is a GTX750Ti that is only 3 months old as it was an emergency purchase when my 550Ti went bang.
The general suspicion is that it may not run a 144hz Panel very well
So finally we get to my GPU related question which is: what graphics card would be required/recommended to run the kind of setup I want.
I am hoping to keep to a single card as if I wanted to go SLI I would need a new mobo as this one is X-Fire only, and I would probably need a new PSU currently have a 650w, and to be honest I really cannot afford to replace either of them right now.
Not overly worried about overclock ability due to lack of knowledge and funds if I get it wrong big time.
Can probably squeeze about £300 ish if I need a new GPU, and then take a few months to save up for monitors.
Only problem I can see with that is my current monitors are old enough that they only have DVI connections so may need adapters or something as I have seen that some cards only have a single DVI connection.
Also not sure if I have to change should I go reference or non-reference.
Any advice gratefully accepted as I am driving the wife insane with my constant mind changing.

So I recently asked for advice regarding purchasing 2 x 24" monitors:
Monitor 1 for gaming, just for fun not competitive BF4, Wow and Elite: Dangerous, so it would be nice to run everything at Ultra settings but to be honest its not a major priority.
Monitor 2 will be used for everything from underwater video/photo editing, (amateur use not professional/commercial film making etc), and general internet type use etc.
Gaming recommendation was a 144Hz of some sort maybe even G-Sync depending on funds,
Second recommendation was for a IPS type panel.
Great I thought I can start looking at relevant monitors yipeeee
Oh wait.... I was then asked what GPU I currently have, which is a GTX750Ti that is only 3 months old as it was an emergency purchase when my 550Ti went bang.
The general suspicion is that it may not run a 144hz Panel very well

So finally we get to my GPU related question which is: what graphics card would be required/recommended to run the kind of setup I want.
I am hoping to keep to a single card as if I wanted to go SLI I would need a new mobo as this one is X-Fire only, and I would probably need a new PSU currently have a 650w, and to be honest I really cannot afford to replace either of them right now.
Not overly worried about overclock ability due to lack of knowledge and funds if I get it wrong big time.
Can probably squeeze about £300 ish if I need a new GPU, and then take a few months to save up for monitors.
Only problem I can see with that is my current monitors are old enough that they only have DVI connections so may need adapters or something as I have seen that some cards only have a single DVI connection.
Also not sure if I have to change should I go reference or non-reference.
Any advice gratefully accepted as I am driving the wife insane with my constant mind changing.