Personal I like a front bar around 30" and side bars around 12". I use two back bars just because I like the feel of two compaired to one.
What brand? I use B-stinger but I'm sure the Donkers are just as good, just like real life the stiffer the better.
and don't forget to buy some extra weights to hang off the ends.
If I had my money to spend all over again I would take a long look at the Fuse stabilizers. they just might be the cats meow on a windy day.