Power hungry but Worth the Upgrade?

[NuclearBiscuit]

I need some expert advice:

I'm a photographer working on a late 2008 MBP 15" 2.4 upgraded to a 7200 HD and 4GB of RAM. The system performs well enough for my Photoshop needs, but I'm constantly dismayed by the battery life.

My question for the you technocrats is the value of upgrading to this new customized machine, especially in terms of battery life:

15" 2.4 i5 w/ 500HD @ 7200 + 8GB Ram

Would I see a significant increase in battery life from the old MBP or would the increased HD speed and RAM make the difference negligible? Ideally, I'd like to get at least five hours out of the machine on one charge.

Thanks for your help.

 

[Hellhammer]

The new one would easily get +5 hours unless you're doing something intensive. If the battery is what you ask for, then it's worth it

 

[candamo]

I sold my Late 2008 a couple of weeks ago for the same reason, if you got the money. DO IT.