Once you find a few wines that interest you use
http://www.wine-searcher.com/ to find it either locally or online.
Most $300 red wines out there are more than likely meant to sit in a cellar for 15+ years before being drank. You'd probably be better off buying a bottle of pinot noir over the Bordeaux mentioned above as it will be a heck of a lot less tannic. I'd recommend something like the Marcassin Marcassin Vineyard Pinot Noir or for less money something from Beaux Freres in Oregon. For the Marcassin, if you can find it, the 2002 vintage was the best of late but the 03, 04 & 05 are all tops too.