my screen: 1920by1080 (32 bit) 60 HZ
My processor: 3.2 GHz (4CPU's)
8192 MB RAM
Graphics card: GE FORCE GT 230
My suggestion is that if you upgrade your video card to one of the following, you will probably be OK and they will cost between $90-150
- 1gb NVIDIA GTS 450
- 1gb NVIDIA GTX 460
- 1gb AMD 5770
Any of those three can deliver decent frame rates (above 30fps) at 1920x1080 for most recent games, most likely including Skyrim.
If you can spend $200 or $300, of course, you can get a better card, but not sure if your PSU can handle it.
Do you happen to know the wattage of your PSU and the model?
EDIT: If you want to run Skyrim with 200 mods, including ultra hi res texture mods, then you may want to consider more drastic upgrade. Also with crapload of mods the load times become ridiculously long unless you install the game on SSD.