What do you recommend best, SILVER PUPPY Mag #2 KIT, or Mag #3 KIT?

Here is some info from silver puppy page about #3a MAG KIT. I was thinking of buying #2 MAG kit, do you think I should go with number 3 one?
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NEW!

The "Mag Stir" Australian version developed for the Outback is now available in the USA

Features Single wire 'Y' cable hookup to run both the Generator and Stirrer from the same power source.

Draws very little power making it ideal to run directly off batteries or other alternatives.

See: http://www.silverwell.com.au/

#3a Mag Kit for USA 12/24/120 volt [$150] Uses your 8 to 32 oz [250ml to 1L] canning/mason jar...up to one gallon.

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