for ESC's id go with a used "brand name" model.
im kinda known for favoring the "cheap stuff" which in general is true but I have never had luck with those super cheap brushed ESC's.
I often am able to find used Traxxas XL-5 or Losi 12T brushed speed controls on ebay for $20-$35 shipped. Both are good models, the xl5 is even waterproof.
you can also snag some decent nimh packs on hobbyking (from their USA warehouse)
you can also get the same basic radio On2 mentioned (they are sold under a few different names)
plus a couple extra recievers(each radio can be linked to multiple recievers)
and if you wanna stay cheap with the ESC, they have these:
you could get 2 esc's, 2 radios (each with a receiver) plus 2 extra receivers, a pair of 7.2v batteries all for $100 (plus shipping) That should be enough to get all your rigs up and running.