Hardware Firewall ??? choose one !

[J-P]

I think the idea is in the subject !

Price range 1000$-2000$  (can be used)
Number of computer on the network 80 

I want to protect all my servers (&workstation) but I 
don't have a lot : Only Mail, File, Backup  No web 
server 

I want something good for many years !
I heard that PIX firewall are very good & I have worked 
before on a SonicWall !

Basicly it's the only information I've got ! 

I'm looking for suggestions or tips of any kind to help 
me choose one !

Thanks in advance !
J-P