Here's something interesting, and I'll try not to come off like too much of a Rustic fanboy.
The holes David mentions, with the exception of 12, aren't even the ones that strike me as the best of the bunch. Of the three world class par 5 starters in LA (LACC, Riv, and Rustic) Rustic's might be the best of the bunch. The green is often overlooked as people are adapting to the canyon effect an speed of the day, but it's perfect. The layup options, enticing length of the hole, and the trench bunker make it an ideal starter. The second hole is phenomenal as well, utilizing the sloping green and hump in the middle to make the WIDE fairway play much smaller when trying to give yourself an approach that will yield a reasonable 2 putt. The 11th is stout and stunning, the 14th is one of the few modern dogleg par 4's that holds the scratch player to a true test (like Dismal Red's 13th). 16's green is up there with any of Ross's best saucers and the walk up to the tee is totally worth it IMO.
LA North is definitely the best course in SoCal, and I've played Riviera a couple times as well. Also walked the place for some of the PGA events, and the scale and setting is second to none. But Rustic is probably superior to Riviera in its current state, price and access aside. Riv just isn't conditioned to be everything it could be, and that's not their fault. I grew up playing Kikuyu but the limitations are undeniable.
But hey, that's just one guy's opinion (or is it?).