it's good deal only if you get it real cheap. you can build one hell of a system for less than a $1000. it's easy. http://www.sharkyextreme.com/guides/MVGSBG/article.php/3286311
Yes, they do. Over the years, they keep recycling style names and numbers. The ONLY box I could find with 5 PCI now is the Dimension 650. (Even the taller XPS only has 4 PCI) Does your case have 2, 5.25" and 2, 3.5" bays to access from the front? The current 4600 (and all the ones with pictures on eBay auctions I could find) have only 1, 3.5" bay... therefore, shorter case = shorter mainboard = 3 PCI slots.
ATI has a few, starting with the Radeon 7500 (?). And the new All In Wonder 9600 Pro is the first AIW with dual output. I haven't used Matroxx and Nvidia so I'm not sure about what type of cards they have in dual/quad, but they have 'em too.
More dual output cards... OfficeMax has an nVidia 5200 based PCI card with dual outputs on sale this week. (hurry) It was in last Sunday's color ad and goes by the "Mad Dog Conquerer" name. You have to find it in the store. I couldn't see it on their web site. $60 after rebates! Yow.