There are a few plugins, yes. Are they anywhere near what Fruity Loops has to offer? God no.
Considering the "professional grade tool" of Fruity Loops is used for...wait...is that MUSIC EDITING? Oh my god. Considering that, I think it's perfectly fair to make the comparison. It's like saying "You can't compare the innate windows tool to burn CD's to Nero!" Yes, you can. Would it be obvious, then, that the windows CD burning tool is useless? Yes, it would.
I think you know where I'm going with this.
Your immediate impression, as always, is wrong. I was excited about Garageband--heard it was easier to pick up than FL and FL at the time was vastly alien to me. After I started using it, though, I realized just how limited and crappy it really was.
Go for Fruity Loops, it's only 100 bucks for the "professional edition", and I'm sure there's a student edition for a LOT less.
Wow, that doesn't sound like a product pitch to me at all!
Oh, wait, it is, because your entire life is devoted to your stupid company.
Backlit keyboards. OH MAN, GOTTA HAVE ONE! "Last longer", "Do more", oh, snap, those are such great features, and not bs statements at all!
Are they better as desktop replacements? Well...duh. Any 2500 dollar machine compared to a 1000-1400 dollar machine is going to be a better desktop replacement (or at least I ****ing hope so). Are they "better" just because they cost more? No. The same components are used in them, the same everything actually (except screens and cases and GPU's obviously) as in the MacBooks. Quit it with your stupid propaganda bull****.
EDIT: Sorry, it's 150 for the Producer Edition, 100 for the regular (fruity) edition, and 50 for the express edition. Then the plugins from FL come as more, but there's a lot of user-made plugins so I wouldn't bother buying them until you know you can use them. Spend the extra money you saved from not wasting it all on your MBP on it, or you can grovel in poverty and end up with an overpowered machine. Your choice.