What I would do:
 
	• wait a couple weeks....IF Apple announces new laptops at their WWDC, hopefully recharging will be via USB-C
 
	          (then there should be many more battery options than currently with MagSafe)
 
	• get a 12.9" iPad Pro and connect via TwoMonUSB
 
	          (four speakers are built into iPad Pro 12.9" or 9.7", but only 9.7" has DCI-P3 gamut)