Hi guys, I'm new here so please bear with me. What are the downsides to buying a 13" "standard" MBP non retina and upgrading to the following specs? 2.9GHz Dual-core Intel Core i7, 4GB 1600MHz DDR3 SDRAM 2x2GB 256GB Solid State Drive SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW) Backlit Keyboard (English) & User's Guide later upgrading to 16 GB RAM bought independently, I do a lot of music production with heavy processing so am fairly certain I'll need it. My question is, are there any disadvantages of doing this, in the end with upgrades it amounts to about the same price, only the standard 13" is upgradable, so should the ram cop out or the battery, I am able to replace it myself. My main concerns are being able to upgrade and whether a bump in processor or RAM is better to serve my needs. I know when running various projects simultaneously 16GB suits me but is the bump worth it when running i7 over i5? I'm also concerned about fan noise, when recording obviously this is an issue. What do you guys think? The other models I'm considering are: the 13-inch: 2.6GHz with Retina display (upgraded RAM) 2.6GHz Dual-core Intel Core i5, 16GB 1600MHz DDR3L SDRAM (upgraded) 512GB PCIe-based Flash Storage Backlit Keyboard (English) & User's Guide or the 15-inch: 2.0GHz with Retina display (Stock) Specifications 2.0GHz quad-core Intel Core i7 Turbo Boost up to 3.2GHz 8GB 1600MHz memory 256GB PCIe-based flash storage1 Intel Iris Pro Graphics Any help would really be appreciated, I'm really unable to choose at this point.