After Having this same debate here is the info i have come up with the system below the major plus are if you look you can find Crazy deals for sub 400 you can get 4 gb of ram in them and there dule 2.X cpu and a nice GPU so you can still use there GPU Core for Pushing heavy Tasks. i will be spliting my system in to 3 Drives 100gb storage and 50 gb win and 50gb Linux.
The Samsung X460 was crafted with industry-leading features to make you more productive. Weighing less than 4 pounds and only 1.25" thin, you can take it anywhere. You can hit the ground running because there are no compromises on performance. The performance enhanced lithium ion battery delivers up to 6 hours of nonstop run time. In a class all its own, for those with a style all their own, the Samsung X460 is a strategy that won't fail.
Product Description Samsung X460 44G - 14.1" - Core 2 Duo P7350 - Vista Business - 3 GB RAM - 250 GB HDD
System Type Notebook
Operating System Vista Business
Processor Intel Core 2 Duo P7350 / 2 GHz / 3 MB Cache
Memory 3 GB DDR3
Storage 250 GB HDD / 5400 rpm
Optical Drive DVD-Writer DL
Display 14.1" LED backlight 1280 x 800 / WXGA
Graphics NVIDIA GeForce 9200M GS - 256 MB
Networking Bluetooth 2.0 EDR, 802.11 a/b/g/n (draft) , Gigabit Ethernet , fax / modem
Battery 6-cell - up to 6 hour(s)
Security Trusted Platform Module (TPM) Security Chip , fingerprint reader
Dimensions (WxDxH) 13.3 in x 9.7 in x 1.3 in
Weight 4 lbs