Treat yourself and get down to the dealer to test drive both. I can't say what's right for you.
If it's me, I'm thinking sports package for 30k is a great deal, but I'm in a different situation than you.
I think when you drive the manual in this car, it will certainly provide you with fun.
And you're holding onto your buick, which I assume is fine for commuting, so if you know ahead of time that traffic is whacked, you can cruise in it.
That's just my impression. Even at that, test drive them both and pick what's right for you.