Much thanks, all. I went ahead and ordered the aforementioned card. It shows up on my doorstep tomorrow, but the wife's got some kind of surprise planned for me during the day, and we're off to catch an Indigo Girls show at night with a bunch of friends. It'd be mighty rude of me to get all involved with any such project tomorrow, so it's gonna hafta wait till Saturday most likely ( h3ll hath no fury like a woman scorned...). If and when I decide to go with 3, that EVGA usb contraption seems like a great idea, Patonb. I do wonder, however it'll work with existing specialized display software like Nvidia has. Ditto for UltraMon, Snowsurfer. Though with a full-feature trial, I'd be an idiot to not give it a whirl. I still wonder at the ability for a vidcard to be able to differentiate the monitors connected via a splitter cable, but at an average of $10 - $15 cable price, I don't mind experimenting. This is, after all, how I learned everything I know, and it was good enough to enable me to make my living doing hardware fixes. It's the expensive stuff that scares me away right now!
I'll report back for anyone who's curious.