The rake (client vs client)

I'm ready to cash out from Unibet on the B2BPoker-network and deposit into Pokerstars.
The dilemma is though, if I should leave some money on my account left for SNGs, cause the 50's only have 2,50 euro in rake, as opposed to 5 on other sites.

It has really soft games but I could just as well get that at PP too, with more stable software, no server issues and more effective multitabling.

How much does the rake matter? I honestly don't know.