[geeks] Firewall recommendation?

[Nate]

Hey folks,

Do you guys have favorite firewalls?  What I need for $dayjob is:  
reliable, secure, low maintenance, good performance, can failover to  
a secondary WAN when the primary goes down.

What I happen to be looking at:

ZyWALL 35 UTM
http://us.zyxel.com/products/model.php?indexcate=1126002763

I'm currently administering an old Watchguard Firebox III 700 for  
about 200 local machines and three offsite VPN users:

http://www.watchguard.com/products/firebox700.asp

Thanks in advance!

- Nate