Fast reliable, uncluttered ROM?

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http://androidforums.com – Hi. I have Samsung Captivate and I'm sick of having to pull out the battery every other day because the phone decides to freeze up for some reason. I rooted it, but I haven't done a lot of modifications..just cosmetic ones like launcherpro. Is there a rom that's very reliable (i.e. no more freezes or lags) and uncluttered? Thanks! (General)