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Am running Win XP on about a 7 yr old Dell Dimension 8400 tower and using the existing 2 ports on the stock SB Audiology 2 sound card.



I somehow doubt you're plugging monitors into a sound card...
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Had to buy an adapter plug for one of the outputs to use the 2nd monitor.



Sounds like a DVI to VGA...
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Have seen some splitters advertised but some reviews say they dim the connected monitors.



What kind of splitter - probably not what you want - I've seen devices that will spread the same image across multiple monitors but they are usually distribution amps.
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Just found the Dell manual and it says there is an S-video slot on the card as well.
Would that work on the LED HD TV?



S-Video won't give you good resolution on a screen that size.
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Would really like a setup like the NCIS MTAC war room but the centrifugal force would probably shatter my electric meter.


Me too!

--=-- My credo: If it's worth doing, it's worth overdoing - just ask my missus, she'll tell ya laugh --=--
You're only paranoid if you're wrong!