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Yes a few additional thoughts:

Quote Originally Posted by 'VonHenry',index.php?page=Thread&postID=57674#post 57674
Questions:
2 - Will I want KeyClone? I will 'never' run more than 2 accounts. 1 window per each monitor. For just 2 accounts seems like KeyClone would just add complexity....perhaps I'm wrong. * Note: I will not be "dual-leveling" a same class. (i.e. 2-Shamms, or 2-SPriests...etc)
You are wrong. :P

You're going to want keyclone, otherwise how are you going to control them both? alt-tab? not a very good solution, to me at least.

3 - To that end. From those with experience. Am I better leveling 2-toons at the same time, or am I better off Power-leveling one at a time, using my lvl 70 hunter?
Well, for all out get there fast, I have to say, you can level 2 toons independently pretty darn fast if you have the right setup. If that's your goal, and you have access to a 70 paly/mage/healer, and are just interested in getting them to 70 asap, that's the better way. Just know that there's a learning curve to m-boxing that you have to sit through, now or later.

4 - Today I usually run WoW on 19-inch, and Thotbott, etc in 17. I assume the best solution for me is to run the 'Alt' character in the smaller monitor. I know I can run the same "install" of WoW twice, but can I do this using separate video settings? (are they account based, or 'install' based)?
5 - Lastly, what are the pro's/cons of using 1 installation of WoW vs 2 installations? Other than managing the WTF common LUAs, is there really a problem with just 1 installation?
Everything is pretty much account based, except mods (which can be turned on/off on an account basis), video settings, and macros you put in "global". The video settings are in WTF/config.cfg iirc.

Fewer wow directories = better performance. If you want max performance, definitely no more than two (one for your main toon, the other for however many clones you have).