Well there was a thread on this a while back by a guy named OWEN which you might want to look up. What exactly is your budget? Your needs are the same as mine, and over the winter, I plan on purchasing a JET JD 17MF. They go for about 4-450, and its a 17 inch model, which means it can drill in the center of a 17 inch workpiece. There is also Delta, which That guy Owen wound up with, and he was pleased.
Unless you find a good used american one, your going to be looking at an import, because while the American made machines are amongst the best, they are also the most expensive. Maybe PM Krooser for some links to good used ones on EBAY.
Below Jet/Delta, Id say Your looking at Grizzly. Not quite as Nice as the JET models, but also cheaper. Below that (as bad as they get) are from harbor freight. The quality control is so bad you will need to take it apart and clean off casting sand. After installing shims and some grinding, many have been pleased with thier HF units.
Jim