I'm fluent in Spanish, and I'm also a classics double major: all I can say is that Spanish is a hundred times easier and a thousand times more useful than Greek or Latin. Yes, you will use Greek roots in anatomy, but honestly, it is far more practical to just learn anatomy in the first place. Also, I agree with an earlier poster that its a lot easier to take Latin before Greek; from my personal experience, I can't imagine how poorly I would have done in Greek had I not taken Latin first. However, I do agree that Greek poetry, especially Pindar (my favorite), is ineffable because English has nothing comparable to Greek lyric or epic poetry. In terms of Latin, you have the opportunity to read Cicero and Lucretius, and ultimately the opportunity to recite them and sound very well educated, especially during interviews