The most reliable LiFe packs by a comfortable margin are the A123 packs. They are different from all the rest in that the cell have a cylindrical shape instead of the flat Lipo type of shape. They are more durable and can deliver considerably more amps to your power system. After that, the flat type packs from the well established manufacturers will be next in line (in no particular order-Venom, Hobbico, Hyperion and others) and then the cheap brands like Zippy and Turnigy.
As for chargers, I don't think it matters much. If you buy from one of the bigger names you get warranty support if something goes wrong along with a manual that was written by someone who actually knows English. If you buy one from Hobby King it'll still probably work but don't expect any help if it doesn't or you don't know how to program it.