Need Network Solution

Our company has a small network of approx 60 computers running at 100mbps. All machines are networked on 3 hubs. We are looking for a low cost solution to move to switches so that we can assign bandwidth priority to users. I am postive that the hubs are what is slowing down our T1 line. Does anyone have any suggestions for any switches we can implement that is a farely cheap, managed, high bandwidth solution?