Critique my Active Directory script

I've got this script working, but I have the feeling that I've done a
lot of this wrong. My GOAL for this script was to:
* Grab a list of all the groups sitting in a particular OU
* From these groups, list all *enabled* users
* Get this list into Excel, somehow (CSV or similar is fine)

Anyway, it works, but I think I did some doublework. Specifically, I
don't think I should have had to run another LDAP query to grab each
user object, and I think I could have reconfigured this somehow to use
the "export-csv" cmdlet.

Did I miss anything obvious? (script below)

#--
$adOU = [ADSI]"LDAP://ou=subsub,ou=sub,ou=mainou,dc=example,dc=com"

foreach ($adGroup in $adOU.psbase.children)
{
$name = $adGroup.Name

foreach ($user in $adGroup.psbase.invokeget("member"))
{
#P&P group naming convention:
#* each department's group begins with the prefix "CORPP&PDept"
#* Full administrative group (with access to all folders) is
"CORPP&PFullAdmins"
$grpName = [string]$adGroup.Name
if ($grpName.Contains("CORPP&PDept"))
{
$grpName = $grpName.replace("CORPP&PDept","")
}
else
{
$grpName = $grpName.replace("CORPP&P","")
}

if ([string]$user -and $grpName)
{

$u = [ADSI]"LDAP://$($user)"
if ((([int][string]$u.userAccountControl) -band 2) -eq 0)
{
##if account is enabled, then go ahead and display the record
echo "$($grpName):$($u.name):$($u.sAMAccountName)"
}
else
{
echo "$($grpName)::"
}
}
else
{
#no user, just echo the groupname
echo "$($grpName)::"
}
}
}
#--