Hello everyone. I am looking to purchase a refurbished 13" Macbook Pro to use for home audio recording, but I have a couple questions... I am looking at either the 2.5GHz Dual-core Intel i5 for $999 http://store.apple.com/us/product/FD101LL/A/refurbished-macbook-pro-25ghz-dual-core-intel-i5 or the 2.9GHz Dual-core Intel i7 for $1269 http://store.apple.com/us/product/FD102LL/A/refurbished-macbook-pro-29ghz-dual-core-intel-i7 In either case, I would like to upgrade the hard drive to 7200rpm. I have found this hard drive for example http://www.amazon.com/HGST-Travelstar-2-5-Inch-7200RPM-Internal/dp/B0097LG9U8 But I'm confused on the whole 2.5 vs 2.9 thing. The HGST says 2.5, but can I use it for the 2.9? I guess I just need some direction on what is best for what I want. My first instinct is that the 2.9 i7 would be best and to upgrade the hard drive on that, but I cant seem to find a 1TB 7200rpm drive for 2.9. Maybe I don't need to upgrade the 2.9 i7? If I got the 2.5 i7 and upgraded the hard drive to 1TB 7200rpm would it be the same or better than the 2.9 i7? Or am I better off not upgrading the hard drive and getting a 15" quad core http://store.apple.com/us/product/FD103LL/A/refurbished-macbook-pro-23ghz-quad-core-intel-i7 I'm just a little lost here. I won't be recording an entire band, just vocals, guitar and using virtual instruments. Help me please! Thank you!