Ok glad that helped and thanks for the revision of the post.
I'd say you will be impressed with current monitors it just how much your willing to pay.
The Acer 23.6" 120Hz 2ms monitor will set you back $350 whereas a standard monitor will cost a bit above $200. Although if you buy today (ends 10/10) you apparently get $50 off the monitor for a cost of $300. It is shown below:http://www.newegg.com/Product/Product.aspx?Item=N82E16824009222&cm_re=120hz-_-24-009-222-_-Product
Now the 3D vision kit is $155 when bundled with the GTX 470:http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.474637
So the cost of getting 3D is $305 or $255 (depending if you make that $50 off). I think you should decide for yourself if you want to spend the money or not. Maybe read some reviews on 3D gaming to see if you think its good enough to warrant the cash.
Hope that helps you make up your mind.