Want to add a 3rd bird. which one?

[eevo66]

Ok, Im using dish 500, 2 301 and 1 3700 Receiver, Im getting 110 & 119 all the basics, just wondering if a 3rd bird would give me more choices, if so what would they give me? and in your opinion which bird would be best.
thanks for any input

[vegasmax]

148 has some locals if your in the right area..121 has HD Channels..do all you want and have fun doing it.