Take mobility out of the equation. Strictly speaking on performance, which is the better computer? Price-wise they're both going to be very similar so that's not a consideration either.
Will be used for:
Photoshop
Illustrator
Converting videos avi/wmv/mkv to mpeg4
Ripping DVD's and BD's
MacBook Pro 17"
Quad-Core 2.3GHz quad-core Intel Core i7 processor
16GB 1333MHz DDR3 SDRAM
256GB Intel 520 SSD + 750GB
17.4-inch Hi-Res Antiglare widescreen display
Intel Graphics HD 3000 with AMD Radeon 6750M
iMac 27"
Quad-Core Intel Core i5 2.7GHz
16GB DDR3 SDRAM
256GB SSD + 1TB SATA HDD
AMD Radeon HD 6770M
Thanks in advance for your input
Will be used for:
Photoshop
Illustrator
Converting videos avi/wmv/mkv to mpeg4
Ripping DVD's and BD's
MacBook Pro 17"
Quad-Core 2.3GHz quad-core Intel Core i7 processor
16GB 1333MHz DDR3 SDRAM
256GB Intel 520 SSD + 750GB
17.4-inch Hi-Res Antiglare widescreen display
Intel Graphics HD 3000 with AMD Radeon 6750M
iMac 27"
Quad-Core Intel Core i5 2.7GHz
16GB DDR3 SDRAM
256GB SSD + 1TB SATA HDD
AMD Radeon HD 6770M
Thanks in advance for your input