Should I purchase the MacBook Pro 15-inch?

from $2399 with

• Touch Bar and Touch ID
• 15.4-inch (diagonal) LED-backlit Retina display
• 2.6GHz, 2.7GHz, or 2.9GHz quad-core Intel Core i7 processor
  Turbo Boost up to 3.8GHz
• Up to 10 hours battery life¹
• Up to 2TB SSD²
• Force Touch trackpad
• 4.02 pounds³

 or the iMac 27-inch?

from $1799 with

• 27-inch (diagonal) LED-backlit Retina 5K display
• 3.2GHz or 3.3GHz quad-core Intel Core i5 or 4.0GHz quad-core Intel Core i7 processor
  Turbo Boost up to 4.2GHz
• 1TB 7200-rpm hard drive; 1TB, 2TB, or 3TB Fusion Drive; or up to 1TB SSD²
• Magic Keyboard and Magic Mouse 2 or Magic Trackpad 2