well if you have a good feeling you're gonna go for a year then why not just buy an affordable desktop rig from the get-go? Spending $1000 on a gaming laptop isn't really worth it when you can spend $500-750 on a desktop once you have settled at your new flat.
Your macbookpro is good enough to do most things you NEED to do and you could play CSGO on shyte settings until you've found yourself a modest gaming rig.
Reason I suggest this is cuz when I went to oz for 2 years, I bought a gaming laptop. It sucks shit and performance noticeably declines in a laptop from general maintenance issues (dust collecting in vents, built-in fans not adequate for cooling, overheat performance issues from prolonged use, etc.) It was great for 6 months before performance started getting sluggish, and the typical day-2-day stuff I would use it for could be done with laptop or desktop at half the cost.
You can always just sell your rig before you leave to some flatmate or some chud on the street aka ZackyChu
what are you doing out there anyway?