So the main problem with the budget route is the dead pixel policy which is deceptive. Perfect pixel means 2 dead pixels and up to any amount of dark pixels which are also dead pixels , but not counted.
That's kinda bull****, but well you get what you paid for.
I'd recommend ramen financing and the Asus swift.
A 550ti is not going to push 4k, its not even going to push 25x1080.
Perhaps wait it out and save ~$1200 to get a gtx 970 and an Asus swift
i am not that serious into gaming to justify both of those.
http://www.amazon.com/PB278Q-27-Inch-LED-lit-Professional-Graphics/dp/B009C3M7H0/ref=sr_1_3?ie=UTF8&qid=1422386126&sr=8-3&keywords=monoprice+monitor
This monitor is essentially the same thing but without all the gaming flare. and cheaper. I will never need 144 fps.
And I am sure a lower end GTX with Display port would do me just fine.
The key thing is.. .You don't want to buy a Cart, with out a Horse.. or a Horse without a Cart..
If you're absolutely RIDIG on staying on Budget-Gear..
Consider getting an R290x which should be going on sale pretty soon for ~$230 and it usually comes with a AMD Gold game redemption card that's worth ~$30-35 that you can pawn on Ebay.. so around $200
And then you want to get a 27" IPS
Now.. the KEY thing about IPS is COLOR.. don't worry about refresh rate, overclocking refresh rate, response time, all that jazz.. It doesn't freaking matter..
Look for an IPS panel with 99% to 110% Adobe-RGB (aRGB) color coverage..
They are FAR more vibrant than standard sRGB coverage monitors.
sRGB is only 70% of A-RGB..
So if a panel says 100% coverage of (s) rgb.. that is the cheaper crummy kind of IPS..
sRGB IPS panels are really no better than TN panels.. IPS has better viewing angle and uniformity, but that hardly matters unless you're a photoshop user..
So if you're getting IPS, the Greatest advantage would be High color coverage..
A 550ti will have trouble pushing lol and dota2 @ 2560x1440.. it might do OK on 2560x1080..
But 2560x1080 is really hard to use for anything except 2:1 movies.. EVEN THEN.. you should really be using madvr, a high quality video scalar, which will require more than a 550TI to scale to 2560x1080..
But yea.. 2560x1080.. it's really not good.. I just wouldn't bother with that...