I am almost certain that Extra Innings does not offer a monthly or half season rate. MLB.TV on the other hand does offer a monthly rate if you want it. I have been subscribing to MLB.TV for the last 3-4 years and am quite satisfied with it. I spend about half of my time away from home for business and for this reason I don't get Extra Innings. With MLB.TV your picture quality is going to be lower. Even when the picture streaming to my computer is "HD", the framerate would often slow down or the feed would stutter. It's highly dependant on your connection speed. Also, in the rare instance that something does go wrong with MLB.TV I've found their customer service to be quite terrible. All things beging equal I would invest a little bit more money into the Extra Innings package for the ease of use and picture quality, but if you travel a lot or live with a TV hog, having the games on your computer is a nice option too. Also, MLB.TV comes with all home and away radio broadcasts too.