You’ll never be satisfied with a tablet.
For portability, I would go with either a MacBook or the MacBook Air. I’ve owned my MBA since mid-2013 and it’s the best laptop I have owned. If you plan on doing more intensive work, make sure that you upgrade the RAM and processor when configuring your product. The base 8gb configuration is more than plenty if you have no intentions of touching products like Photoshop, Final Cut, any music DAW, etc.
The downside to the regular MacBook is the lack of peripheral inputs, but HyperDrive has this hub that allows passthrough charging with additional ports. Also, Apple changed the keyboard mechanism for their standard MacBook and MacBook Pro and supposedly it’s one of the worst recent changes to their line-up; a speck of dust has been reported to mess with keys and some keys end up having a more sponge like touch to them instead of the proper click.
Honestly, I would wait. Apple is planning on refreshing their line-up relatively soon (sometime Q2). This buyer’s guide is quite informative.