Should I go for a managed switch?

Hi all,
It's a SBS2K3 network with 2 servers (SBS and LOB) and 65 computers. The SBS2003 will be migrated to SBS2011 soon.
two main switches: Dlink 2x24port, unmanaged. I am thinking to replace them with 1x48port. I am wondering if I should get a managed switch or not. Would a managed switch help troubleshoot network slowness? If so, this can be the reason that convinces
me.
Any thoughts?
Jack

I think a question is how is your LAN configured. One client has 30 workstations and another 20 mobile scanners with Access points. The complex is three building big so we use fiber from server site to each of the two other buildings. From that smart switch
we have 100ft runs to where most of the workstations are.
L2 switches provide easy way to find bad performing mobiles and cable issues.
Other client is all one floor one building and the not-smart 48 port switch is perfect as all new set runs, proper wall mounts and standard length cat6 set runs.
I do like smart switches, more options if you need them, great at start of upgrade and rather have options and not use them that to go back to owner for more money a year from now.
Guzzifrank

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