I'd suggest one of the two Nokia ones (LD-1W or LD-3W). I have the 1W working with my N73 and it's great. The LD-3W I believe uses the new smaller-barrel power cord. Both are small and inconpicuous, just ebay for those model numbers. I picked up the LD-1W from CompUSA for $80 earlier this year. Reason I say stick with Nokia is so in the car you just have one charger.