I rode on them for awhile, and never really liked them. I have track drops now, and they feel a lot better. With the horns, when you tilt them down, there's not much to grab onto on the front. If you like the drops, stick with them. IMO, the only reason for horns is aesthetics, and I don't really like the look anyways.
As far as a $50 fixed wheel goes - don't waste your time. Get like an entry level Surly fix/fix laced to a Mavic MA3 (they go for around $115-125 around here) and have a wheel that will last longer than a couple of months.
Are you just wanting to try out fixed gear? Because that Univega in your sig looks like it has gears.... At any rate, if you try it and love it, you'd end up with a crappy wheel that you'd have to replace soon if you go the cheapo route. If you get a decent wheel, ride it for a few hundred miles and hate it, well there's always ebay and craigslist...