If you're going to be using it several times, the Bearikade is the way to go. But it's expensive (just over 200 I think). Otherwise the Bearvault is a good canister. Just a little heavier. Get some grippy tape to put on the lid to make easier to open. I saw alot of hikers struggle opening it. I'm sure that there is a place that you could find to rent a BearVault or maybe even a Bearikade if you look hard enough.
I took a 60L Mountainsmith Phantom (2003 model) when I hiked on the PCT last summer (only 2000 miles, I'm lazy). And if I went again I think I can get down to the ULA conduit. I've trimmed the gear list alot. Getting a canister in there will be tricky, but I think it's possible.
Don't camp near Thousand Island Lake. There were 2 bear encounters there last year on the samee night (same bear). Including one that got into an Ursack with the approved liner. I heard the story second hand, but it sounded like the opening at the top was open just enough that the bear could get his tongue in there and pull the food out.
Technically it might be possible to hike bearbox to bearbox, but then you're entire schedule is based inconveniently placed boxes (either shorter or longer days than you want). Also a couple of thru-hikers got checked for canisters and didn't have one. They got lucky and only had to turn in a receipt that they bought one to avoid the fine. But even if you're technically allowed to not use a canister if you go bear box to bear box, you're going to have a hard time explaining that to a ranger. They expect every backpacker to have one. Not worth the hassle IMO.
Oh and there really is a significant problem with bears in the Sierra's (mostly heavy use areas). These bears are very, very talented. I was told a story about a bear that would jump out of trees trying to break the branch that the bear bag (not allowed) was hanging from. And all night long, the campers just kept hearing this loud crash and thump (imagine a 250 lb bear falling 10 feet onto a branch and then onto the ground). They told a ranger about this strange noise and he said that Kamikaze must be back in the area.
The Sierra's are probably the most amazing place I've ever been. It's a great place to take a trip.