NVIDIA 525M vs ATI 6770 HD ?

Hi I intend to buy a notebook PC for Multimedia and gaming ...
I'm getting the following 2 deals :

HP Pavilion dv6tqe :


• Genuine Windows 7 Home Premium 64-bit with Service Pack 1
• 2nd generation Intel(R) Quad Core(TM) i7-2630QM (2.0 GHz, 6MB L3 Cache) w/Turbo Boost up to 2.9 GHz
• 1GB GDDR5 Radeon(TM) HD 6770M Graphics [HDMI, VGA] (480@725MHz )
• 6GB DDR3 System Memory (2 Dimm)
• 750GB 5400RPM Hard Drive with HP ProtectSmart Hard Drive Protection
• No Additional Office Software
• FREE Upgrade to Norton Internet Security(TM) 2011 - 15 Month Subscription (activation required)
• 6-Cell Lithium-Ion Battery (standard) - Up to 5.5 hours of battery life +++
• 15.6" diagonal Full HD HP Anti-glare LED Display (1920 x 1080)
• FREE Upgrade to Blu-ray player & SuperMulti DVD burner
• HP TrueVision HD Webcam with Integrated Digital Microphone and HP SimplePass Fingerprint Reader
• Intel 802.11b/g/n WLAN with Wireless Display Support
• Standard Keyboard
• HP Home & Home Office Store in-box envelope

Price : $927.49


Dell XPS 15 :


• Genuine Windows® 7 Home Premium, 64bit, English
• 2nd generation Intel® Core™ i7-2630QM processor 2.00 GHz with Turbo Boost 2.0 up to 2.90 GHz
• NVIDIA® GeForce® GT 525M 1GB graphics with Optimus (96@600MHz)
• 6GB Shared Dual Channel DDR3 Memory
• 750GB 7200 RPM SATA Hard Drive
• 15.6 FHD B+RGLED TL (1920x1080) and Skype-Certified 2.0MP HD Webcam
• Integrated 10/100/1000 Network Card
• Adobe® Acrobat® Reader
• Tray Load Blu-ray Disc BD-Combo (Reads BD and Writes to DVD/CD)
• JBL 2.1 Speakers with Waves Maxx Audio 3
• Intel® Centrino® Wireless-N 1030 & Bluetooth 3.0
• Microsoft® Office Starter: reduced-functionality Word & Excel w/ ads. No PowerPoint or Outlook
• McAfee Security Center with VirusScan, Firewall, Spyware Removal, 15-Months
• 56 WHr 6-cell Lithium Ion Primary Battery

Price : 1030 $

Which is the best deal ?
Please compare in terms of the following :

1 . Which Graphic card is better in terms of handling games at high settings? 
2. Which LCD screen is better in display ( HP or DELL ) ?

In my opinion Nvidia has Optimus , thus switchable graphics so better battery , but ATI has nothing like that...
But ATI is GDDR5 ..
Still I've heard NVIDIA are better ....


Which is the best deal ???