TP-Link 48-Port 10/100/1000 Gigabit Switch Gray TL-SG1048 - Best Buy
S5810-48TS-P, 48-Port Gigabit Ethernet L3 PoE+ Switch, 48 x PoE+ Ports @740W, with 4 x 10Gb SFP+ Uplinks, Broadcom Chip - FS.com
TP-LINK JetStream 48-Port Gigabit L2+ Managed Switch with 4 10GE SFP+ Slots (TL-SG3452X) - The source for WiFi products at best prices in Europe - wifi-stock.com