go big or go home....
i detest laptops and macbooks. reason being, they make something that's infinitely better and more reliable....
either a PC or an IMac
and if you really are just concerned about something portable for travel purposes, they make little netbooks that are 10-11" for 200$ which travel very well. and from my experience, i've been able to run DxO on one, but you better not be in a hurry to convert files. Otherwise, it ran it quite well, and if you get one with more ram, even better.