I heard Sygate personal firewall conflicts a lot with windows basic firewall ( that is for those who still want to keep windows firewall for their own PERSONAL REASONS)
I know two virus scan applications often conflict but two firewalls should work okay.
Actually, $2300 looks to be a pretty good price for that unit. What he was referring to is a HARDWARE firewall. There is a BIG difference between the capabilities of a hardware firewall and a software firewall. I won't get into specifics right now though.
Generally, most users would be fine with a software firewall, as many don't bother with updates and even configuring advanced functions of the software. There isn't much need for a hardware firewall for home use, unless you have the cash to burn, or if your profession is working in security.
Personally, I just use windows firewall, and McAfee Enterprise Edition for my PC.