Aw man,
those are magnificent.
Last year I bought their Zombie Horde 3 box at Salute.
Never got any further than priming them and now, seeing these beauties makes me even more reluctant of starting on 'em.
Very simple to do simply as well as taking a top drawer paint job, just use thin basecoats, (thin your paint, you'd be suprised how many people still don't) this does the job for you re: highlights if you use a pale undercoat, (white or grey, I rarely use black on zeds) do the skin first as it's a inky messy game, then tidy up the clothes and paint simply. Job done.
Get to it!!!!