The best lamp is the Lightforce although it is far from perfect and you will almost certainly end up rewiring it,and the best batteries are without doubt the Lithium Ion ones because they are so light,the only downside with th=ese is that when they run out they just stop there is no tailing off to give you a warning.
Martin
My li-on 10amp has a line of green/red lights that give a warning as to remaining power.
Best bit of kit I have bought for a long time, worth every penny.