9800GT SLI Questions

So I have a couple questions. I currently have a BFG 9800GT 512MB running at 1920x1200 and I run most of my games at or near max settings. I've been debating going SLI for a while now and on a whim looked up cards on Newegg for pricing.

The card in my system is very similar to if not exactly http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The card I'm looking at is http://www.newegg.com/Product/Product.aspx?Item=N82E168... (I really like the passive cooling idea).

My questions are these:

First, will these 2 cards work if I were to put them into SLI? It's been probably 5 years since I built an SLI system (right when the technology was first released) and I distinctly remember having the understanding that the cards had to be identical. These have the same chipset and the same amount of ram, is that enough?

Secondly, I have a HDTV connected to the secondary DVI on my current card via a DVI to HDMI cable. I don't use it all the time, and typically only for watching movies, etc. The last time I built an SLI system, I recall that if you wanted to use multiple monitors, SLI mode had to be disabled, and that disabling required a reboot. Is this still the case?

I appreciate any help/thoughts that can be provided.

Thanks