I did this about a year ago...quit directv, and went to Hulu + for the tv shows I was watching, and tried mlb.tv for the angel games.
Only thing is, if you are in market, you can't watch your team on the net, you can only get out of market teams, so no Angel games was killing it for me, and the fact that Directv throws all sorts of incentives at you to come back, so in the end I chopped my bill in half, and went about one month without Directv.