What about Service Broker.

We are using Service Broker extensivly in 2005 and this alone is a excellent reason to upgrade. We are using many of the new...

Instead of nesting it why dont you just add the check to the case.

For example

SELECT CASE WHEN TOT_CALLS_INB_PDN = 0 OR TOTAL_LOGIN_TIME = 0 OR TOT_WAIT_TIME = 0 THEN 0...