Room analysis tools

Have anyone expirience with good room analysis tools.
what kind of software and mickrophone is good to use and which methods do you use too get a more acustic ballenced lisining room. In other words how do you build a superior music lisining room. 
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Get good advice from GIK Acoustics.

I use OmniMic for room calibration and speaker design/analysis.

It's pricey but complete, and the auto-blending features pretty good.
Others use Room EQ Wizard with a calibrated mic.

Also, GIK has recently introduced a free online acoustics planner. Worth checking out.