Hello,
I would recommend a Cisco 2950 24 Port or 48 Port. You could also look at a Extreme Summit48i. We currently run the Cisco 2950 48 Port and also some Extreme 48i. It is really depending on the income you can spend. You can pickup a used Extreme 48i for anywhere for $1000 or less and you can pickup a new Cisco 2950 for around $3000 new as a figure. I mean, it depends if you got the money to spend.