Im not sure whether I need a Standalone or Stacked switch. I honestly do not know the difference. I have seen a switch that I am interested in, it's a D-Link 24 port managed Layer 2 Switch. (DGS-3224TGR) It has a 48Gbps Switching Capacity and runs for just under $2000.00. I failed to mention in my original post that I currently have a Dell 10/100 on my network that conatains 24 ports and I will continue to use it. All workstations have Gig Nic cards, I hope that answers your question LUI3.
Our network plans to grow to 80 users in the next 2 years at which time I will purchase another switch. Currently I have around 40 users.
I apologize for the confusion of my first post. I appreciate the response and expertise that both of you have offered.