SSDs are great, but really only worth worrying about for laptops where their inherent robustness is worth it.
At least that's my view on them. I guess if I spent my days doing something that hammered the drive then I'd think again, but for me, most of the stuff I do benefits from more RAM rather than a faster hard drive.
I think Apple might use Samsung at storage chip level rather than drive, but I can't remember it that's in computers or iPhone/iPads.
Rumour has it a trimforce command has appeared in the developer version of the new version of OS X. Whether it stays there in the final version remains to be seen, but it would answer the prayers of those who really want TRIM.