Try this link I think these are the next generation from the switch's I listed earlier:http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-2960-c-series-switches/data_sheet_c78-639705.html 

I've just been on Cisco website these switch are end of sale and life. Sorry.

Hi Mitchen,Try the two models below, probably ideal for small retail shops.WS-C3560-12PC-SWS-C3560-8PC-S

Hi,No sorry WS-C3750X-48 is not POE compatible, If your on a budget try POE injectors it might work out cheaper. 

Yes ASDM is to manage firewall's only. You can buy Network Monitoring applications to monitor your hardware.