HD Video Edit & Playback

Hi. What three types of lap tops should I consider for edit'n HD video using Sony Pro or Adobe?

Frozenlead, Thank you so much. Question? Would this be good choice if I increased the RAM to 5 or 6GB?

HP - Pavilion Laptop with AMD Turion™ X2 RM-72 Dual-Core Mobile Processor, Model: dv7-1245dx

Product Features
AMD Turion™ X2 RM-72* dual-core mobile processor for true multicore processing
HyperTransport™ 3.0, AMD PowerNow!™ and AMD CoolCore™ technologies to extend battery life; improved security with Enhanced Virus Protection.**
4GB DDR2 memory
For multitasking power, expandable to 8GB.
Multiformat DVD±RW/CD-RW drive with double-layer support
Records up to 8.5GB of data or 4 hours of video using compatible media; also supports LightScribe direct-disc labels using compatible LightScribe media.
17" WXGA+ high-definition widescreen display
With BrightView technology and 1440 x 900 resolution showcases your movies and games in stunning clarity.
320GB SATA hard drive (5400 rpm)
Offers spacious storage options and fast read/write times.
ATI RADEON HD 3200 graphics RS780M
Features up to 1918MB shared graphics memory for lush images. HDMI interface for additional connecting options. SRS Premium sound with built-in speakers.
Quick Launch buttons
Put your media within easy reach. HP mobile remote included.
Built-in HP Pavilion webcam with microphone
Makes it easy to chat with and send video mail to family and friends.
5-in-1 digital media reader
Supports Secure Digital, MultiMediaCard, Memory Stick, Memory Stick PRO and xD-Picture Card.
4 high-speed USB 2.0 ports
For fast digital video, audio and data transfer. 1 eSATA/USB combo port.
Built-in high-speed wireless LAN (802.11b/g)
Wirelessly connect to the Internet.
Built-in 10/100Base-T Ethernet LAN
With RJ-45 connector and V.92 high-speed data/fax modem delivers flexible wired Web connectivity options.
Expansion port 3
Allows additional expansion options.
Weighs 7.8 lbs. and measures just 1.7" thin
For portable power.
Good battery life
Of up to 2 hours and 30 minutes.
HP Intersect Imprint bronze and chrome finish
Features an argyle-like pattern for a sleek look.
ENERGY STAR compliance
Assures a high standard of energy efficiency.
Microsoft Windows Vista Home Premium Edition 64-bit operating system with Service Pack 1 (SP1) preinstalled
For a stable platform from which to launch games, programs and applications.

The price range of $700 before taxes....