[cellinis]

Dave,
Worldsex or hun, both have more or less same amount of traffic sent to galleries for me. The reason for this is probably the 3 table layout on Worldsex that gives better exposure to a larger number of galleries (and unless you are paying for it, it is tough to get a top 20 listing on hun).
As far as quality goes, the hun is certainly better based on conversions, though any listing on worldsex usually gets 5-6 signups as well for me. AL4A is more like a bonus and it is much easier to get listed though I've never managed more than 2-3 signups per gallery on it. If your galleries sell on other sites, Worldsex might be a good choice. The money is certainly not wasted, that's for sure.

Edit: Average bandwidth for a movie gallery on hun is 240 Gigs (I haven't submitted pics in a long time) and average for Worldsex is 180 Gigs on movies and 30 gigs on pictures based upon my experience.