Costco has the new 2018 MBA 8/128 on sale for $1000 (compared to Apple's $1200) but I saw today that Best Buy has the 8/128 MBP on sale for $1050. My wife has the old 2017 MBA and I'd like to upgrade her to one of these. She just does email, browsing, and office apps. Is the MBP worth the extra $50 vs the new MBA? Thanks!