I’m looking into buying a new laptop, can someone tell me if this is a good system.

HP 15.6" Pavilion G60-519WM Entertainment Laptop PC:

* 15.6" diagonal BrightView widescreen display
Presents 1366 x 768 resolution (WXGA)
* Intel Graphics Media Accelerator 4500M (shared) with up to 1309MB of total available graphics memory
* Intel Celeron Processor 900
Provides 2.2GHz speed, an 800MB frontside bus, and 1MB L2 cache
* 3GB of DDR2 system memory
Furnishes enough memory for today’s demanding applications and can be expanded to 4GB
* 250GB SATA hard drive, 7200 rpm
Stores up to 71,000 photos, or up to 62,000 songs, or up to 30 hours of HD video, and more
* LightScribe SuperMulti DVD optical drive with double-layer support
Plays and creates CDs and DVDs with support for 11 different formats
* LightScribe technology etches custom labels right onto LightScribe-ready discs
* Wireless Wi-Fi and wired Ethernet
Connect to a broadband modem (cable or DSL) wirelessly or using the wired 10/100 Ethernet port
* Also wirelessly connects to a Wi-Fi signal/hotspot with 802.11b/g wireless LAN
* Built-in 56k modem for dial-up connections

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HP 15.6" Pavilion G60-519WM Entertainment Laptop PC Software
# Genuine Windows 7 Home Premium, 64-bit edition. To learn more about the features of Windows 7, Click here.
# Microsoft Works 9
# Microsoft Office Home and Student 2007 Edition, 60-day trial version
# Symantec Norton Internet Security 2009, trial version including 60 days of complimentary live updates
# HP Software: HP Help & Support, HP Advisor, HP DVD Play, and HP Set Up
# Cyberlink DVD Suite
# Muvee Reveal
# Adobe Acrobat Reader
# HP Games Powered by Wild Tangent

Enjoy the clarity of full-screen movie playback on the HP 15.6" Pavilion G60-519WM Entertainment Laptop PC. The powerful Intel Celeron processor, 3GB memory and a 250GB hard drive allow you to easily manage everyday computing tasks. Get online more quickly with Windows 7 and high-speed wireless LAN, or create personalized DVD and CD labels on LightScribe-enabled discs with the LightScribe DVD burner.

I have a Intel pentium 4 processor hyper threading technology operating at 2.8 Ghz 1Mb L2 cache 800 mhz front side bus that is currently discontinued as of 2008.
Which processor is best/better overall between a intel celeron processor and the one above i have stated?
I am also talking about the recent intel celeron processors that are still out in the market today. for example, the latest ones like 2.0ghz and up.
also additionally, is the new intel celeron dual core processor much better than the pentium 4 stated above or the single core celeron?
thanks