Need a third DVI output for my PC

What I have in the living room:
A fairly modern computer (no SLI) with GeForce 8800GT (2 DVI OUT) connected to:
A monitor (Sceptre, 4:3) for work and playng Sims2
A LED DLP Samsung TV 1080p (to watch DVD/HD movies).

I just bought another one of those Samsungs (smaller size) for the bedroom - for gaming/dvd/hd-movies (yes, I have a long-range wireless keyboard and mouse).

Question. How do I connect the new tv to the computer (yes, I have a long DVI-HDMI cable and an audio cable separately)? Without having to replug the cables all the time.

First I thought there must be something like a KVM switch, but upside-down, to switch between 2 monitors on one DVI. Nope, seems like there is no such thing (at least for reasonable money).

Then I found this http://www.techonweb.com/products/ [...] C2P&src=FG and similar. So it's like an external videocard.

Question is, if it's a videocard, will it be able to output such heavy content like Sims2 or hd-video?

Or is there another solution for my problem, for around $100?

Any thoughts will be appreciated.

P.S. my 1st post here, so I hope this is the right section of the forum for it. Or maybe it should be over in the home theater one?