I have been reading all the forums for a couple weeks trying to decide how to fix the extended desktop issue and dual boxing.
I have 2 8800gt's and winxp.
I run a 26: samsung and a 22" samsung lcd.
I have 4gb of ram
I get low fps as most do when running dual view on xp. Even running ONE instance of wow on the extended (2nd monitor) gives me a 25-27 fps cap!!! when I drag it to the primary side I jump to 60 fps solid! So I'm sure it must be the xp dual view issue.
I have read about the dual view problems in xp and understand they probably are not going away, so I need advice on what my upgrade path should be.

Reading the forums there are 2 thoughts on solution # 1...upgrade to vista ultimate 64.
Some say it will fix my low fps issues and others say it will not. It is supposed to handle DX better on the extended desktop for my dual box alts, but I am looking for confirmation of this.
Since I already have 2 graphics cards, it seems a shame to go back to one since i am getting the same fps with 2 as I did with one in xp. And if this solution works, I will be able to make use of both graphics cards for only the cost of Vista 64.

Solution # 2 is to go 2 machines, which for sure will fix my fps issues and allow me to actually use my 2nd 8800 and not have it sit in a drawer as a loss. I do however, like the ability to scroll across from one screen to the other using one mouse, and one keyboard. I am reading about the vetra, but wouldn't upgrading to vista 64 just solve the extended desktop fps issue anyway? keep both cards in one machine and one mouse one keyboard for a lot less $$ and the same performance than the vetra route.

Solution # 3....unknown
Any suggestions would be greatly appreciated.