i don't get it.
let me tell you a secret. it's not what anti-virus, anti-spiware you use, they all have their matches out there. I use a very old nod32 v2.7 anti-virus just for the sake of it (pretty nice it alerts me on viruses) and really it ain't that good except for the speed (that is why i kept it. after tweaks to the registry and many other my system boots up as fast as a fresh win xp install and trust me i have some programs at boot time)
I have many viruses, trojans in my pc (that i use and i can control to infect others). have bite adders to make them invisible to anti-viruses, even have av killers for many av you've posted here.
The safe way is to know what you are doing ! Download soft only from manufacturer. I use torrents and dc++ too but i know what i'm looking for (even though ny av stopped me getting infected thru torrents)
So, my advice, get a simple av, maybe even with anti-spyware if you like, but be carrefull what to download. The only thing you should really get is a firewall because there are many hackers out there scanning and breaking into servers (i know for a fact

)
I have nod32 v2.7, spyware doctor wich ain't running, just a scan every 2 month and a online scan by kaspersky, trendmicro and bitdefender every 6 months. This keeps my system in top shape (firewall provided by router)
BTW: for the post above: try eset smart security. is nod with av, anti-spy and firewall. Cracks can be found out there but i can't tell where because i ain't allowed