Hi.
I´ve been running Pro Tools on a 2009 27" iMac since it was brand new. With Pro Tools 11 I started getting more errors and worsening performance, so I went to Studio One. It runs really good on my 7 year old system, but the plug-in count leaves something to be desired. I also run Studio One on windows 7 PC´s at the school where I teach music. Sometimes I borrow a 2013 Macbook Air from my wife, to run Studio one at work. I have several 1 year old Dell Laptops, but the difference in experience between a 3 year old macbook and a 1 year old PC with Win7 is incredible. They way macs run, the way the hardware feels in use,everything. It´s an insane difference.
I have never seen an install of windows running cross plattform software as smooth as a mac of equal power. My buddy uses Sonar, so I can´t compare that. But when running PT, Studio One and other Audio software I always get the best performance and stability with macs.
Getting a 13" rMBP will be a great machine for audio applications, and I for one am turning my iMac in to a dedicated Thudnerbolt display for my new RMBP as SOOON as the Skylake models launch. The 13" model is not all that expensive compared to Dell XPS, and the difference between dual core i5 to i7 is negligable when running audio software. Of course a quad core i7 in a 15" would be even better, but the e years old Macbook Air is already crunching it with Studio One.
I mention my background with Pro Tools and Studio One because I considered reaper when I felt the system requirements for Pro Tools were leaving me behind. But if you are going for a new DAW, then I think S1 is THE DAW to get. great community, developers who listen, best workflow I´ve ever tried, easy on the system requirements and all around nice guys. (Presonus.)
I still keep Pro Tools around because some clients insist on it, but I will usually track in it when they are looking, than bounce to Studio One and do everything else there, and them send them the mixes. Loving Studio One and think it will be AMAH-ZING on Skylake rMBP.
Pm me if you want to continue raving on about DAWS