Help choose my processor

I'm about to order an HP DV6000t laptop, and I need to decide which processor would be ideal. I won't be using this for heavy gaming or video-editing...mostly everyday surfing, student work, and managing my music collection. Here are the choices HP gives me:

1) Intel? Celeron? M Processor 520 (1.6 GHz, 1MB L2 Cache, 533MHz FSB) Included in Price

2) Intel? Pentium? dual core processor T2130 (1.86 GHz, 1MB L2 Cache, 533MHz FSB) +$75

3) Intel? Core? Duo processor T2450 (2.0 GHz, 2MB L2 Cache, 533MHz FSB) +$100

4) Intel? Core? 2 Duo processor T5300 (1.73 GHz, 2MB L2 Cache, 533MHz FSB) +$170

Also, the system ships with Vista Premium, but I have a new copy of XP Pro that I might use instead. I'm thinking by using XP it'll cut down on resource usage as well put less strain on the 1GB of RAM I'll have on this laptop. As well as your opinions on which processor suits my needs best, do people think it would be a better performing system to wipe the HD and use XP instead?

Thanks!

The Core 2 Duo is something that you don't really want to pass up on. It's a pretty amazing processor.

I'd recommend going dual core as well, if you have the extra cash for it that is, otherwise the included one will work fine but Celeron processors are cut back Pentium's so for at least $75 its worth upgrading.

A little Celeron M: http://www.intel.com/products/processor/celeron_m/index.htm

More info on Dual Core: http://www.intel.com/technology/computing/...-core/index.htm

More info on Core 2 Duo: http://www.intel.com/products/processor/coreduo/

Core 2 Duo