j4900b HP ProCurve Switch 2626 24-Ports Managed Stackable 10Base-T 100Base-TX Fast Ethernet with 2x10/100/1000Base-T/SFP
Best Buy: HP ProCurve 2915-8G-PoE Stackable Ethernet Switch 2915-8G-POE
J9088-61001 - HP ProCurve 2610 Series 2610-48 48 x RJ-45 Ports 10/100Base-TX + 2 x RJ-45 GE Ports + 2 x SFP (miniGBIC) Ports Layer 2 Managed Rack-mountable Stackable Fast Ethernet Network Switch
switch - Connecting two HP 2910al Switches using SFP to get 2Gb/s speed - Network Engineering Stack Exchange