Hi there. I have an MacBook Pro Mid 2012. I bought it because it was the last macbook pro that could be upgraded with more ram ( Apple says max 8Gb but max is 16 Gb ) And what Wilddrums said Is absolute the best. I have also SSD disk (2disk's in fusion) and maxed out ram. a Friend of me have the newest Apple MacBook Pro 16 inch (2,6GHz 6-core i7)
and paid € 2699,- euro that's +/- $2909,- US-dollars and my laptop is in some cases even faster then his new one (It is a beautiful machine) I Think a pc with less capability is for starter ojk. But I give you my word for it that if you stay making music even for one day in the week. That if your into it and make songs from start to end. The time, you want or have to upgrade, is faster yhen you think. I bought the 4 Gb ram version. After one year I upgraded it to 8 Gb. And half a year after upgrade I regretted I didn't bought 2x 8Gb ram for it. But at that time I had less money. But just keep saving is what I had should done. Also the SSD disk.I think you cannot compare the working speed of you machine with normal spinning diskdrive in it. World of change for me there. Fusion drive is another story there ;) but moneywize I', still on the MacBook Pro mid 2012 and bought a second one from Marketplace really cheep stil a working one thou. And bought SSD for it an maxed out the RAM. If there is something damaged I just change it. Well not myself, I let it change by a tech guy who ask for a disk change on my macbook pro 2012 20,- bucks. I tried it but had to ask my girlfriend to put the screws back. To figure out a day later the screw are not all positioned the same.
But really I'm on mac only for the music. The first time I heared the Garageband sounds an I played an software instrument. I was hooked.
If you buy a mac pro you can easily change disks RAM and other things yourself (If you'r handy with electronics and pc's). Down side is if you want to DJ you still need )If u wan't to use Traktor Pro for instance. You need a laptop. With good RAM and reliable SSD.
Regards,
Matthijs