First of all.... did you read the spec's??? CEP is PC-only.
I've owned Macs and PC's since the early 80s and at this point in time, the choice of platform is irrelevant. Pick the software you want to run... see what it will run on.... and then pick whichever one you are comfortable with and can get support on. ANY of the current Macs or PCs will run any audio program well.
If you are the only Mac-person in your town, it's harder to get someone to help you with your computer. If you are a PC-person with a bunch of collaborators who are Mac-only, you're not going to have much luck when you need to tweak your PC to get it to work right.
ALWAYS USE THE K.I.S.S. PRICIPLE = Keep It Simple, Stupid.
Whichever platform you pick, get in a user group in your area... they have answers to questions you don't even have yet. Better yet, have the church let the local computer group meet there... you might get some geeks to install and tune up your systems for free.