Hi there,
I’m actually pretty bad when it comes to computer specs etc. but I can give you my experiences production software wise.
I use MacBook Pro with specs:
-2,7 GHz Intel Core i5
-8 Gt RAM
I use Ableton Live 9 and some ‘heavy’ plug-ins such as Waves Audio, Maschine 2.0, Kontakt etc.. Yet I haven’t encountered any CPU problems. On worst times my CPU have been at 40% but usually on finished tracks it’s around 15-30%, no crackles or any other problems. So atleast to me, it seems like your choice of computer is up to the job to work ez with Logic Pro. Oh, I should say that my tracks are max 10 track projects so if you’re looking to do some 20-30 track projects… I cannot guarantee your choice works well.
Also if you haven’t thought of this yet, get a decent soundcard if you don’t have one. By decent I don’t mean it needs to costs hundreds… There are MANY decent options within the price range of 100-200€ (Yamaha AG series are deffo my favorites from that price range)
Hope this helped even a little. Have fun with your choice! 🙂