My only comment would be on the smart chargers. I don't know if the ones you've listed allow you to change the current per battery, and you may not have to, but i've found this thing amazing:
Not the cheapest, and there may well be cheaper alternatives but being able to boost the charge when needed (say in between 2nd and night dive) and then having another 4 on for trickle charge (non-smart) is quite good. What's nice about this is that it also does AAA batteries.
There may be more light weight ones that do 8, which would be preferable i guess!
I use a similar one of these too for regular charging (at home) of AA batteries - but without the USB facility. Like sinetwo, I find it is good.
For travelling though I'm going with a USB charger and the USB AA battery holder/charger as Interceptor suggested. It's very neat, very portable and very flexible.