hey, just wondering about the MBP 2015 15-inch model processor options. comes with a 2.2 ghz i7 as standard. however, if i go for an new laptop this year i'd like to pick the highest tier, the 2.8 ghz i7. any side effects i need to be aware of? does the machine by any chance run noticeably hot/noisy in this configuration over the slower cpu options? thanks!