Doug,
I would recommend the DX3S with MR200 RXs. The MR200's are 2-channel, and are easier on the wallet than the MR3000, which is 3-channel, with dual outputs for each channel. It's more than what the average boater needs.
The DX2S is similiar, but only has 5-model memory.
If you have the chance to go check one out before you buy, take it... I think you'll like how light it is (only used 4-AAs, not 8), and you can also get a grip kit for it to customize the size of the grip. There are fancy aluminum steering wheels available in multiple colors, and I even recently saw a graphics kit for the TX, if you are so inclined.
Here you go:
DX3S: http://www.spektrumrc.com/Products/D...ProdID=SPM3140
MR200: http://www.spektrumrc.com/Products/D...rodID=SPMMR200
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