Either SBP or SDO
You'd be good either way with platinum from both. If you're buying SBP, buy the lockoff unit was opposed ot the standard 2BR. The MFs on the l/o SBP is a bit less than SDO.
From a pricing standpoint, the 2BR platinum l/o units have done pretty good at holding their own on selling prices. 2BR units at SDO have dropped quite a bit over the last 6 months, pretty close to what SBP is selling for.
Another option would be to pick up a couple 1BR platinum regular villas at SBP. If you're patient, you can pick those up for about $800 - $1000 all in right now. MFs on those are about $380 so actually less than the lockoff.
It depends on how you want to use the unit. If it's strictly trading, then I'd go with the SBP 1BRs but the 2BRs give you more options than just for trading (ie. renting, direct exchanges)