Adam's black and green halves is gorgeous but not with white socks, white socks rarely look good, particularly when there's little or no white elsewhere on the kit, they just look terribly out of place.
Looking back at the historical kits site I think my favourite apart from the 60s chest hoop classics might be the 1948-49 one, green shirt with black trim, white shorts, green and black hooped socks. I think you could do a modern version of that which would look excellent, be a bit different and feel really right as an Argyle kit.
The worst kit, recent or otherwise, is the two tone Adidas monstrosity. Literally everything was wrong with it. The wrong badge, the weird stripes, the bizarre shoulders and misplaced Adidas badge, two different greens (three if you count the dark stripes and back not quite matching), white socks, the Ginsters blob, I have never hated a kit like I did that one.