I've been using buckets for primary going on 3.5 yrs now... I have spigots installed in most of them. (I keep forgetting to buy additional spigots for the rest). Since I keg, I attach Js Kegging Apparatus to the spigot, pull airlock and open valve. Beer flows into the keg and no siphon needed.
For a dip tube I use a shortened racking cane held in the spigot with a #1 bung. The end of the dip tube has the little black/orange thingy to help keep yeast from being sucked up....
I'm very happy with my system. I disassemble the valves at cleaning although I do have to admit I often pitch onto a yeast cake so that disassembly may not be at every cleaning...
In short, I feel your fine.
Some pics for you: http://ipb.trainerfamily.net/pagesmith/4
I brew the best beer around.... don't believe me, ship me a keg of your finest and I'll email a picture of me testing your beer with a write up....
OnTap: Last Minute Pale Ale
Fermenter: Last Minute Pale Ale 2 , sCider (Hi-tess), Js Mead
OnDeck: J's Stout, Vanilla Porter, Js Pale Ale, Js Strong Ale, Js Vienna Lager
Most of J's Recipes here >>> Iron Pony Brewing