My Warlock at level 32, wearing Nightsky Robes:

She has since got new robes, a new
staff (and a new
wand, not shown) and new shoulder… pad… things. Here she is at level 33:

The shoulder pads, which I bought at the Auction House, are more for function rather than looks, as they give me Stamina. They clash horribly with the robe, sadly. The robe is the
Enchanted Gold Bloodrobe, which I got from an enjoyable series of quests. I love the Warlock quests. Cheers to Id, who helped me out enormously.
I’ve never dug the Pads of the Venom Spider for cloth wearers – there are just prettier options. Those look like puffy leaves to me – better on a druid or hunter. Who both can wear leather, so why bother? Wish we could color the gear like in Guild Wars.
I don’t like them much, either, but I didn’t see anything on the AH (at the time) that gave me similar amount of benefit. Boo.
I was disappointed that the dye I saw being sold by merchants in WoW couldn’t be applied to armour.
Yeah, I got all excited about that too. BTW – your lock is still purty ;-)