If you'll be using eneloops get a smart charger, vc8 is a good option, i have it too, among many others.
However there is a small problem with nimh, most of them are not that great with smart chargers, they do not terminate charge properly, in case of eneloops it is all fine, but other brands, not so much. You could get a smart charger, put in a battery, it will charge, but it may not charge them fully, that is the issue i experienced with many nimh cells brands.
At first i had no idea, my smart chargers do not fully charge nimh cells, I noticed my eneloop cells took longer to charge than tenergy, and other brands, so i ran other cells in discharge mode, and realized they only charged half way, or even less in case of D cells. At first i thought the cells must be shot, but then I used simple 4 bay charger( that came with Duracell nimh 2300 iirc, horrible cells, btw.) then i discharged them in a smart charger and noticed that dumb charger did charge cells fully, while smart chargers would not.
Now how much better are the smart chargers vs dumb timers? that is a good question, if we take identical cells, use them the same way, but one was charged with a smart charger, and other was not, the one from smart charger will probably give you more lifespan, how much more, really hard to answer exactly, depends on battery brand, charge current.... I personally didn't notice dramatic drop, but then i'm not using nimh enough to compare 2 side by side in such a long term comparison