email gateway appliance for antivirus and antispam for 3-5k?

["jpippin" <jpippin () gmail com>]

I know this has been covered several ways over the years, but searching my
archives isn't bringing up what I need. Maybe some of you can help. I want
to purchase a hardware appliance to take the "Edge Transport" role for my
soon-to-be-installed E2K7 server. I want to know all the options and narrow
it down to three or four. So please share opinions and experince on devices
that meet the following requirements:
 
- Hardware only. I don't care if I have to install management software, just
don't want it on the server. I'm a big fan of decomposed architecture.
- Anti-Spam AND Anti-Virus solution (excludes companies like Barracuda). 
- Less than $5k for 3 years TCO. I don't care if the box is $3k or $5k as
long as maintenance and subscriptions keep the total under $5k.
- Anywhere from 25 to 100 user device is fine.
 
Possibilities so far (feel free to comment):
IronPort C100
Sophos ES1000
Fortinet Fortimail
 
Thanks in advance.
 
 
 -J