OT: Corporate antivirus

[Gareth]

We have been using Trend for the last few years but the latest version
we upgraded to a year ago has really gone downhill. We had to upgrade
the XP machines from 256MB to 512MB just so that the machine did not
take over 5 minutes to boot (no exaggeration).

What do you recommend as a good corporate antivirus and preferebly anti
spyware product as we are seriously considering switching?

Thanks
Gareth