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As far as running low of free space, you're safe. You can, however, give your MacBook a boost by installing a 7200rpm hard drive. This will speed up system and application startup.

I've always preferred Western Digital drives as a personal preference.
 
As far as running low of free space, you're safe. You can, however, give your MacBook a boost by installing a 7200rpm hard drive. This will speed up system and application startup.

I've always preferred Western Digital drives as a personal preference.

thanks! but would the 7200rpm have a big affect on battery life or over heating?
 
I have the same drive (WD Scorpio Black 320 GB) and I haven't noticed any significant drop in battery life, no increase in heat, and a pretty decent performance boost.

You'll be glad you did it.
 
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