MacBook user here and the minute that you mentioned Excel, I became a little worried. Personally, I wouldn't want to use Excel on a tiny 12" screen. The MacBook Pro would be better unless you buy a larger screen for home use I guess.
I try to only use Excel for keeping records of client billing & tax returns etc.
Has anyone BTW tried Apple's Numbers? Again you could use this and save as a Excel document.
As someone who NEVER could get my head around Word, I took to Pages like a duck to water.
I have the old MS Office on my Mac and OMG it's truly HORRIBLE. Takes forever to launch - 3-5 minutes and overtime I use Word, I get constant beachballs. I try to use Pages instead and save it as a PDF for clients.
I have Pages and Numbers on my home iMac 2012 and both run very well, I did have Word a few years back but I hated it took far too long to open and the layout was just annoying. Pages is so much simpler to use, in fact I use it daily for rough edits of writing work along with Final Draft.
I even have Pages and Numbers on my old and worn out