Bitcoin along with another alt Currency?

[NeoEvaX]

For awhile I have been using CGMiner to GPU mine on my mac. Along with Bitcoin mining I was also using my CPU cycles for Litecoin mining. SO here is the question..

I know Litecoin is really a fraction of the worth of bitcoin.. And I know there are a few other's out there.

What are yall's thoughts on mining two things at once.. one using GPU and one using CPU..

Half the time I have free power.. and I can watch my CPU heat levels..

SO, thoughts?