LAN Routers

I need to subnet out an existing 0 subnet network into 7 subnet network and need a recommendation on LAN routers. Running W2003 SBS w/AD with DHCP on the SBS box. 3 additional member servers and a total of 58 workstations with the subnets as follows:
4 subnet 1 which is the W2003 SBS DC & 3 mbr servers
15 subnet 2
8 subnet 3
5 subnet 4
11 subnet 5
11 subnet 6
8 subnet 7

Follows a new organizational structure management wants with each department subnetted.

Budget limitations are about $2500 to $3000 USD for equipment.