GHScouts

I see the Venture is waterproof, but the Legend specs don't mention anything about it being even water resistant. However, offroute.com says both the Venture and Legend have a waterproofness standard of IPX7, whatever that means. The Legend is $219 at Amazon.com with $40 rebate, so $179 seems like a good deal. Any other info? Do I need the cig lighter adapter or the pc interface cable with cig lighter adapter that amazon also sells (both for around $28)? Thanks!