ITMS video stutters on pbg4, up ram or chuck it?

[foidulus]

Whenever I watch video I bought from the iTunes store on my PB g4 1.5Ghz 1 gig ram it usually stutters(esp. with the Daily Show). Doesn't make the video totally unwatchable, but it does get annoying pretty quickly.

Would getting more RAM help? Or should I just suck it up and dive head first into a MBP?

 

[0007776]

More RAM may help, I have noticed that too on my 12" 1.33Ghz, but I think it may have something to do with the processor clocking down to save battery since it doesn't do it while plugged in.