I finally broke down and bought a Cabela's one this year. Its the 3/4 hp, #12 head, think it cost me $330 after some discounts/free shipping. My brother in law has had the same one for 5 years or so. He has ground thousands of pounds of deer, elk, hogs, and beef through his. He uses his for stuffing sausage and meat sticks. I bought a 7 lb vertical stuffer (Weston brand) and it works so much better than the grinder does for filling cases. The stuffer makes it a one person job rather than 2 (or 3 if you really want to do it fast).
Previous to the Cabela's I had been using the one dad put together 20 years ago. Its a #22 grinder he bought at a farm store that came with the v-belt shiv. He had a 3/4hp motor laying in the shop, connected the two, after replacing the bearing in the back of the grinder with a decent one it has worked pretty good. He needs a jack-shaft on it to get the speed down, but hasn't taken the time to make one, and its worked for 20 years.
Another forum I go to several have the $100 unit that Northern Tool sells on. One of the guys lives in Colorado, he usually gets 2 elk a year and a deer. Said it works just fine.
Have seen several recommendations to the grinder attachment on the KitchenAid mixer. Yes, it works, as I have the attachment. After having the big Cabela's, I don't think the KitchenAid will ever get used for grinding again.
As mentioned above me, LEM always gets good marks.
For burger, we grind into the poly-meat bags, then use the bag taper system. You just twist the poly-meat bag, then push it through the taper, hands free taping. Works great.
For seasonings, bags, tape, casings, knives, and anything else butcher related, I highly recommend Midwest Research and Supply in Wichita. I'll make an order in the afternoon and UPS will have it on my porch the next day (I'm 3 hours east of them).
www.midwesternresearch.com