mac book pro vs macbook pro retina pricing!?

Don't buy MBPr yet. There is a significant problem with display from LG. It is highly chance that you will get defected display 7 to 3 from total out of 10. LG displays have Image retention issue right out of the box or it will be developed later after using it 1-2 months. you will go through buying and returning cycle like most of us do until you get a Sammy display that has 0 IR.
Think about it.

https://discussions.apple.com/message/19539972?ac_cid=tw123456#19539972

you can always buy a Samsung SSD 830 512 for almost half the price of what Apple charges and as said above the rMBP is rev A so you pay for the privilege of testing the new machine for Apple basically.
go for a the 15" i7 2.6 GHZ. buy 16 gb of Ram and a 512 SSD. and you're god to go

$350 for 512GB SSD drives right now. Why on earth would anyone buy Apple's overpriced option?

Give the rMBP another year before jumping in. Read the first 3 or 4 pages of this forum - lots of problems apparently. BTW I swear I saw a video over at OWC showing the SSD being replaceable now. Cool...but give it another year.

I am a music professional. I chose against the rMBP simply because I need something with a ton of memory and a lot of storage.