I have just ordered a Macbook Pro 15 from Apple, and have just ordered a OCZ Vertex 3 Max Iops. I have heard a lot of problems about the Samsung 830 on other forums where they are actually beach balling a lot (may have been resolved though
Even look at "the Samsung 830" thread, all the thread is about is issues, I wouldn't be going near one right now.
I have always liked speed that's why its the Vertex 3 for me.
So I would not be buying the old Toshiba drives from Apple, yes they support TRIM but the Vertex's and other Sandforce (not Samsung) have garbage collection so good that TRIM is no longer needed. They also have good warranties so if you have a problem just go back to them and not Apple. Apple also ridiculously overcharge for old parts. Mind you Max Iops Vertex 3 uses Toshiba Toggle NAND anyway.