Hi Jason I use the foretrex 101 with rechargeable AAA batteries.
I find I get about 5 normal days sailing out of them + I keep a backup set at well. The 101 is also about $40 cheaper then the 201.
Mathew I could not think of anything worse than rocking up to sandy point only to find I forgot to charge the 201.

Also Mat congrats on you PB's down there awesome. How do you like that new speed board of yours.
ta Michel