im waiting for that charger to come back in stock, at 25 bucks it one of the best deals in rc, and it will work great w/ those lipo's
for the rx batteries i would use these
http://www.all-battery.com/6v1400mah...connector.aspx
or these
http://www.all-battery.com/6v2000mah...ctor11106.aspx

they should last you most of the day, i have at least 100 of their batteries and they have been working great, no complaints