Any reasons to expand RAM up to 8GB?

So...
My system is based on early 2009 Unibody 17" (C2D 2.66 w/4GB RAM) and Echo Indigo djx. I use several instances of ES2, EXS24 and Playback (total sample data amount is way under 300MB) as well as Propellerhead Reason (reWired) with VA and arpeggiators.
Is there any good performance-related reason to get 4GB more RAM (up to 8GB total) if I don't use huge samples in my concerts?
Thanks)

If you aren't pushing your MainStage memory meter into the red .... I don't think you would gain any performance by adding another 4Mb RAM. Keep a close eye on the meter (in the toolbar, make sure it is displayed) as you practice and see what it is doing. In my case (2.4GHz MacBook with 4Mb RAM), 4Mb is plenty; it is CPU power that I have to be careful of.

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