Let's try and pull this together
WE have "real time"
and WE have "on demand
Our primary defense is AVAST in Real time for AV
For Real Time Anti spyware FREE there are only a few choices
Spyware Terminator (without AV or Toolbar)
Windows Defender
Spyware Doctor via Google Pack- without all the other garbage
Spybot t-timer
YOU can have only ONE of the above anti spyware real time installed
Now for AV on demand scanners there are many good ones- just do not INSTALL another AV along with AVST
For Anti Trojan emphasis
A-Squared
For Anti Spyware emphasis
Spybot search and destroy
Malware Bytes Anti Malware
SuperAntiSpyware
have as many as you want
Spywareblaster is in a class by itself
I would not rely on Spyware Terminator as my primary scanner but a fine choice for resident protection
SPyware Terminator scanner better than Spybot? depends, sometimes yes, sometimes no
do you know what you are going to get next?
(Hint MBAM forum recommends Spybot as alternate scanner)
watch for false positives with ALL PROGRAMS