TI BAII-Plus got me through college just fine, and it's much less expensive than the 12C. That said, I use a 12C now for work and love it. RPN is so much nicer once you get used to it. Very easy to visualize what's being done. I don't see much point to the HP 12C Platinum since unless I miss something, the only thing that the Platinum adds to the 12C is the ability to choose RPN or algebraic. No benefit unless you just can't wrap your mind around RPN and are fixated on an HP. Personally, if you don't want RPN, get the TI, it'll do everything you need.
ZV