If I'm buying Sanke's...

[RGillette10]

Do I want the "drop in" or the "threaded" system?

See options here:

http://www.amazon.com/dp/B009XPF3AK/?tag=skimlinks_replacement-20

http://www.amazon.com/dp/B009XPF3IW/?tag=skimlinks_replacement-20

 

[suorangeguy]

Drop in. The threaded is similar to Miller kegs and I find them a much bigger pain in the A.

Those are sold by beveragefactory.com. If your buying more and one or two call them direct as they offer volume discounts even for small orders.

 

[JRems]

I would say the opposite. The thread in ones are much easier to work with since there is no snap ring.