I've got 4 x 100 watt KCs on my TJ and always been happy with that - 2x pencil beam, 2x wide beam.
One night about a year ago we had a spotlight comparo/demo in Perth.
I turned on my spotties and highbeams and was feeling pleased with myself until the bloke next to me fired up his HIDs and LEDS - the difference was unbelievable. Made my 4 Halogen KCs look like crappy yellow candles - turning my lights off made no difference!!
The LEDs light up EVERYTHING in all directions but didn't have much to offer long range.
The HIDs have great range but don't come on instantly - they take a while to warm up and reach peak brightness.
The guy with the LEDs and HIDs said he very rarely uses them on the highway because the reflection off signs, reflectors on marker posts and even catseyes is blinding.
Then when he turns them off, he can't see anything
Is it possible for lights to be TOO bright?
I imagine LEDs would be sensational offroad though - and HIDs too if you are offroading in a very open area.