If it's just one or two of you going, I would go with Mears. I used them before DME became available, and I had no complaints. For three, I think the price of Mears and a limo are about the same; for more than 3, the limo would be the best price per person. I've never used a limo, but I've heard good things about *********** and Happy Limo.
OK, that's interesting. Apparently, DISboards has some issue with the first company I listed. I mentioned them because I know that PassPorter boards recommends them.