stay away from the imax there a cheap knock off from the bantam line. at rcgroups theres a thread about all the issues with the imax. theres a few people that like it but more that have issues

for 100 you can get the cellpro 4s which is nice usa made high quality charger http://www.fmadirect.com/products.htm?cat=45&nid=4 nothing but positive remarks and raves. [does need a 112V converter] [old pc power supplys work and an optional $18 converter will be avalible in a week or so direct from fma. this charger is feature rich yet easy to use.

my second choice was the hyperion for $139 at readyheli or rchover [112v converter built in]