I have a retina Macbook Pro from 2012 which has a quad core 2.3 ghz (i7-3615QM) processor and NVidia GT 650M GPU and I would like to find a laptop with better specs (It's been 4 years) but the same form-factor (slim aluminum body). I also do not want to go down in display resolution to HD from the 2880 x 1800 I have been enjoying. Any recommendations out there? I really appreciate any help!