I read on the card specs that the GeForce 9800 GTX(G92) 512MB 256-bit is Certified for Windows Vista and the GeForce 9800 GTX+ 512MB 256-bit is not...
If I will be using windows vista should i still go with the GeForce 9800 GTX+
yes get a GTX+ for around $150ish. If you can affort it though go for a gtx 260 core 216 such as: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
the above poster is right though the 4870 at your price range is the best deal since it keeps up with and occasionally beats the 260.
All in all though willits479 the 9800 GTX+ isn't a bad card and for your little 19" at 1280 x 1024 it will run just about anything at max gfx since your not throwing insane resolutions at it. The gtx 260 or even the 4870 is a tad 'more' than you need but hey there's never anything wrong with adding a bit of life to your machine now rather than having to upgrade again sooner than you want.
and is there really that big of a difference between a
Intel Core 2 Duo E8500 Wolfdale 3.16GHz
Intel Core 2 Duo E8400 Wolfdale 3.0GHz
No they are the same 45nm chips and same amount of cache. You can easily overclock them both with an aftermarket cooler. I'd say get a decent cooler and overclock the the 8400. Sure its the same price as, ok a little bit more than, the e8500 w/the stock cooler but you'll be able to push your 8400 anywhere up to 3.2-4.0ghz depending on your cooler and how much time and effort you want to put into overclocking.