Based on my inadequate experience and life, over the last few or so years whatever seems to run about $85-95 and has solid reviews (like what Pringo linked) tends to always seem to be the best buy at whatever time if you want to run with lots of devices. And it'll last you a good number of years.
I'm sure there's good cheaper ones though and sales obviously, the Belkin I have I got for $60ish at Staples or something but is normally in that range.