Build Your Own Gaming Notebook

Alienware notebook versus Macbook.? Okay homeslices, I need some help. I'm looking into investing big bucks into a laptop. I'm down to Alienware or Mac. I'm a small time gamer, but I run decently large programs besides that. I customized a Alienware and this is what it looks like. Genuine Windows® 7 Home Premium, 64bit, English Intel® Core™ i7-820QM Quad Core Processor 1.73GHz (3.06GHz Turbo Mode, 8MB Cache) 1 Year Basic Service Plan 1GB NVIDIA® GeForce® GTX 260M 15.6-inch WideFHD 1920x1080 (1080p) WLED 8GB Dual Channel DDR3 at 1333MHz – 2 x 4096MB 500GB SATAII 7,200RPM Slot-Loading Dual Layer Blu-ray Reader (BR-ROM, DVD+-RW, CD-RW) Primary - 9-cell (85Watt) Lithium-Ion Battery Wireless 1520 802.11n Half Mini-Card Alienware M15x, Cosmic Black and with some accessories it comes out to about 3000 bucks. My mac choice looks like this 2.66GHz Intel Core i7 8GB 1066MHz DDR3 SDRAM - 2x4GB 500GB Serial ATA Drive @ 7200 rpm SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW) MacBook Pro 15-inch Hi-Res Antiglare Widescreen Display Backlit Keyboard (English) & User's Guide That comes out to about 2800 dollars. I just want the best hardware. I plan on replacing the OS with Ubuntu anyway to make a mad fast computer. Can wait to hear your answers. :D