I have a 5 pound stainless steel stuffer I purchased on ebay for $50 plus shipping. I just use a c clamp to affix it to my countertop. I can add the spices, mix and stuff 10 pounds in 20-25 minutes. And the cleanup is SO easy. Put the pieces in the dishwasher and you are done.
I would highly recommend this one: http://cgi.ebay.com/Industrial-5lb-Meat-Sausage-Stuffer-NEW_W0QQitemZ140267542970QQcmdZViewItem?hash=item1 40267542970&_trkparms=72%3A1205%7C39%3A1%7C66%3A2% 7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14
I also have a 20 pound cast iron one our family used at the slaughterhouse, but its so heavy and harder to clean I almost never use it unless I am making 50 pounds of kolbassi.
My uncle has one of the cast aluminum 2 1/2 pound horns and it is SUCH a pain in the *** to stuff with that thing. I always give him grief about using that thing. Slides all over the place, have to use wax paper at the plunger, takes the fun out of it.
Edit: looks like Pops has the same brand of stuffer I have but he has the 15 pound one. As I said above, I don't really need anything more than a 5, as it is just as quick to do 20 pounds in 4 batches. I would only recommend the 15 or bigger one if you are frequently making 30 pounds or more at a time.