Power draw-sli question

No. A UPS with Parachute software will let you know how much you're drawing from the wall, or a Killawatt meter will do basically the same.
1150w is much more than enough, unless you're running a couple dozen drives and off the wall cooling.
Yes.

Probably be a good idea for you to read over this article.

http://www.bit-tech.net/hardware/graphics/2009/01/08/nvidia-geforce-gtx-295-quad-sli-review/16

Its better to have more power than you need than not enough under load, Johnny Guru said it best, select a power supply that has all the connectors you need without using any adapters.



They would have to be identically clocked, there could be no differences what so ever with any core clock, shader clock, or memory speed settings or it won't work.

@DellUser1

That pic in your sig, doesn't look like any Dell I've ever seen, whats the story behind that?

I don't really use a Dell anymore   ( My old Inspiron 9100 laptop sometimes )

Thanx to the help I found here I built my own a couple of years ago and the photo is what it evolved into.
The photo is a little dated at this point, has the Dominators on it, they've been replaced with the GSkill in my sig ( A reccomendation from The_Blood_Raven ).

Was that a homemade rack its assembled on?

No, it's an HSPC Tech Station
http://www.highspeedpc.com/

I was using it to "breadboard" builds and decided to use it for myself, building on boxes again  

Here's some more photo's that show what you guy's have done to me
http://contrvlrhomepage.no-ip.biz:12300/mypictures/

Well its confirmed, the computer bug has bit you in the rear, you are hopelessly addicted, nice command bunker you got there!