i want to know best card to play games listed star wars galaxies, eve online, final fantasy 11/14 ever quest 2 and show up (for gf) i want to play these on max settings lowest lag with coolest temp card. and cheapest best card to do so.
Yup, at that resolution they will max out those games no problem. 5670 is a bit more powerful than GT 240, but both are enough. If you want to get the GT 240, get the GDDR5 512MB version of it, as that is the best version of the 240s.
GT 240 or HD 5670. You don't need anything higher than that.
Even low resolutions can benefit greatly from better cards than those.
If you are specifically looking for something low power and cool I'd recommend either the HD5750 or HD5770. The HD5750 will be a small upgrade over your GTS 250 and the HD5770 a decent one. Both are DX11 and very power efficient.
A bigger monitor is actually a good idea. There's a huge difference in gaming on a small low res display vs a much larger HD one. I still wouldn't recommend that card however. There are better models/brands and for not much more you could get an HD6870 or GTX 470 which are better cards.
Picking out a monitor is in general kind of a personal thing. People have different preferences for size, resolution, aspect ratio, pixel density, response rate, viewing angles, contrast ratio, etc. It would be best if you could visit a local store that has a bunch of monitors on display for customers to check out so you can see what you personally prefer.
If you just want something that is a decent and a good deal for the money Newegg often has some nice deals on Asus monitors like this one; http://www.newegg.com/Product/Product.aspx?Item=N82E168...
In general this is a good spot to keep an eye on for good deals on monitors; http://www.logicbuy.com/subcategorydeals/13/Computers/3...
This card is the one I would get; http://www.newegg.com/Product/Product.aspx?Item=N82E168...
There was recently a deal for one that was $230 before rebate and $200 after. If you aren't in a rush you may want to hold off and keep an eye out for a similar deal. Also the GTX 560 will supposedly be released this month and will probably be similar or a bit better in performance(vs 470) with improved power efficiency.