I went to Pomona Food Locker today and found their selection and quality to be excellent. Prime rib $6/lb and ox tail $3/lb. Tony was very helpful and offered me a selection of seasoned and non-seasoned prime rib selections. He even had it cut, tied, and vacuum sealed to my specifications. I bought a 12 lb pre-seasoned prime rib from him, cut into 2 pieces, plus a large bag of ox tail (cut & vacuum sealed).
For people on a budget, I could recommend "Superior Grocers":
<a href="http://www.superiorgrocers.com/">http://www.superiorgrocers.com/</a>
I went to the one in City of Industry, on the way back from Pomona. They have 3 store locations in Santa Ana that's closer to Irvine. You can go to their web site and see current week's specials. For this week, they have prime rib at $3.99/lb, pork shoulder roast at 69 cents per lb, 5 lb potato bags for 59 cents, 10 lbs cabbage for $1, 7 lbs onions for $1... you get the idea. We had a rain check from them for 10 lbs oranges for $1 (from prior visit) and used it today.
At the City of Industry location, the meat section is off to the left. If you look on the shelf, what's there is often the left-overs from other people's pickings. Thus, the prime rib packages sitting there looked mediocre, which is why I rarely buy from them. But off to the side was a cart on wheels, where the butcher is rolling out new packages to stock the shelf. I looked on it and saw some really nice prime rib, and decided to pick up a pack for $30. Spoke to the guy stocking the meat section and he indicated that I could just talk to their butcher next time.