Disk Quota Software Recomendation

I am looking for a recommendation for disk quota software. I want to set varying quotas on our individual users home folders which reside under a shared folder on our Win 2003 file and print server. I something that will set quotas, send e-mail alerts to users, tie into AD, and allow me to set exceptions to the quota. I want to exclude the mail archives, *.pst,  from the quota total. I have looked at three products so far. 1) Check Quota Standard, which does not tie into AD and in my opionon is not a quality product but does allow for the exclusion of file type from the quota total. 2) CheckQuota Standard 3.1, this did not even seem to work. 3) SpaceGuard SRM which I was very impressed with and does everything I am looking for except that it does not allow for setting up exclusions to the quota total. So I am looking for a recommendation. Please do not suggest MS built in Disk Quota as it does not have the flexibility I am looking for. Once again I am looking for a recommendation for a product that will set varying quotas, lock users out when the quota is reached, send e-mail alerts when the reach a certain threshold, and allow me to identify files that should be excluded from the quota totals.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Have you seen the Quota system available in the R2 version of Windows?  It's different and more extensive than that in regular Windows.  I'm not entirely certain it meets with your exact requirements.

What you ask for may exist, but with the R2 quotas, the market for Quota software has diminished and I don't think you have many choices here.  Someone may have something more specific to recommend, but the only significant other products I can suggest you look into is SpaceGuard (which you've already seen) and one I evaluated YEARS ago - Quota Advisor.  

Why must things be this way.  Meaning, why are you using PST files?  No Exchange Server?  And/or Why not make a separate share on the server for the PST files - exclusions are no longer needed.

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I will leave the following recommendation for this question in the Cleanup Zone:
Accept leew's comment as the answer.

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