I think you did right by going with Alienware. Those guys know what they're doing. I build custom machines myself so I rarely if ever recommend a mainstream brand. But if people have the money, I would say Alienware. Besides if you're working for a company whose giving you a $3K budget they almost surely have a corporate edition of office pro with plenty of licenses to go around. Just one thing, like the others mentioned, don't leave home/work without your power adapter!
AMD 2000+ - AOpen AK-77(Pro-A) - 512Mb PC2700 DDR-RAM - ATI Sapphire 9800Pro
120Gb WD 7200RPM - 30Gb WD 7200RPM - AOpen 16x Slot-Load DVD-ROM - AOpen 48x12x48 CD-RW
2 160W Speakers (15" Woofers, 12" horns, and 3 2" super tweeters on each) - Infocus Projector about 6' screen. - Windows XP Media Center Edition