Buy a 22" FULLHD resolution Monitor and wait patiently until u gather funds for video card. With 6100 u can't play most of the games - even in 19" (1440x900)
22" and 24" FULLHD Recommendations
BENQ E2200HD - <10K
SAMSUNG 2233SW - 10K
BENQ G2412HD - <13K
DELL S2409W - 15K (not sure)
The reason for mentioning about the 24" is that they aren't too costly and if you intend to watch movies from some distance in your bedroom - a BIG screen will be sweet than buying a smaller screen and getting itchy about that 2" INCH LESSer (which I feel now)
What's your CPU? - It is the main requirement for you to play HD movies. Of course, now NVIDIA has enabled CUDA acceleration and you can play HD movies with your video card - but I 'm not sure whether it supports older cards too!
I've got a D930 processor and it easily plays 720p movies but 1080p with some hiccups. So now I use NVIDIA CUDA on my 9600GT card to play lovely HD clips on my 22" monitor.
Recommendation:
Buy a 22"/24" FullHD monitor - Working with a large widescreen monitor is a treat. YOU got ample space. For the time being, play the games with less resolution (OR play in window mode with black background). After you get some funds you can buy the video card and be pleased with quality FULLHD games. Happies Endings
BUT if you buy a NON fullHD monitor now, for say around 7-9K, later you'll feel for not being able to see quality 1080p clips until you ditch this monitor.