What ever brand of blade you decide to go with, be it freud, Forrest, or one of Infinity's blades, make sure it is specific for radial arm saws. I cant stress that enough. a good radial arm saw blade needs to have a negative hook angle on it. If you put any other type of blade on there you run a very high risk of it grabbing into the stock and comming back at you.
Also, it is a very good idea to have 2 blades for the type of work you are planning on using this for. One for the general purpose and one exclusively for your finish cross cuts.
Safety safety safety. the ras is one of the most dangerous tools in your shop!