MacBook Air is the best along with Apple Motion 5 which is an absolute must have in the visual arts. I also have Maxon Cinema4D and Photoshop. On a 2015 MacBook Air I can render 4k video in Motion 5 without bogging down too much.
Pixel Squid plugin for Photoshop is the best thing going and the quickest way to make images for all task.
motionVFX (FCPx and Motion 5) makes the best plugins and templates which I use for Video and Images. I have calculated that for every $50 I have spent on their plugins I make $1000.
No single WordPress theme is the best. I got the special Lifetime Pack from Theme-Junkie which has more than 60 kickass themes. ThemeIsle makes smooth WordPress themes and also Feedzy RSS plugin.