it really depends on your usage. if you are using it with easy access to a charger and extra recharables, want the brightness, and can afford it, then get the 3W raw. If you will not have the luxury of being able to recharge your cells easily - if you are on a business trip, vacation, camping trip, hiking, etc. then you will probably want the 1W raw for the extended run time and greater brightness with primary cells since that will most likely be what you are taking along. also, if you ever plan on giving this to anyone else who is not a flashaholic and thinks that recharging a battery for every 15-20 minutes of use is ricidulous, then you would probably want to get the 1W raw for them. (i am not saying that it is ridiculous, but it would seem that way to outsiders.
just so you know though, i don't have either of these, but i've been thinking about it for quite some time, as you may have guessed... although, this NS may have me waiting since one of the things that caused me to hesitate was the lack of any water resistance.
i hope this helps!