stutter in iTunes when clicking song to song

[Merkyworks]

I have a decent size music library(40+gig) on my late MB and i find that iTunes is slow to load when I open it and sometimes when im clicking around songs there is a half second pause before the song is highlighted and then starts to play. Since the program is pulling the info off the HD im thinking that if i got a higher capacity 7200 rpm drive that this would help (currently my stock 150gig only has 50gigs left) with this stutter or would upgrading to 4gig ram help?

 

[wrldwzrd89]

The way to determine which upgrade would help more is to check Activity Monitor. This will tell you how much CPU, disk, and RAM resources are being used. It can be found in your Utilities folder.

I recommend opening it either before or after you open iTunes but before you start playing any songs.