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Replacement for Cisco 3550-12G

I currently have a Cisco 3550-12G.  This switch has at total of 12 ports, 10 of which are fiber GBIC ports.  What type of switch do you recommending me replacing this with?  I know most of the switches now are SFP based, which is fine, I'll just have to purchase an adapter for the end of the fiber.  The only cisco switch I see on Cisco's website that I think can replace it, is a WS-C3750X-12S-S.  From what I'm reading it has 12 SFP ports.  Is there any other solutions from cisco or is this it.  Thanks.
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I don't see the 3750G's on Cisco's Website just the 3750X.  I guess they are EOL?

Just an FYI, I have a total of 7 switches in a large office building that currently connect to a Cisco 3550-12G.  The seven switches are a combination of 2950's, 3550's, and 3560's.

Sp the WS-C3750X-12S-S should work for me right?  For the 2950s and 3550s, I will just have to purchase fiber adapter/cable since this switch has SFP ports and not GBIC's right?
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but why change it?
We are changing it because upgrading switching is in the budget for the next year.  As I said they have a total of 8 switches some which are over 12 years old, and we have had two die over the last year.  The client could also reek the benefits of a gigabit LAN, QOS, etc.
WS-C3750G-12S then, are you using all the fiber ports?

WS-C3560G-24TS - which is 28 ports all gigabit, from which 4 of them are sfp.
As I stated in my questions I have 7 switches that all connect to the 3550-12G via fiber.  We are replacing the 3550-12G, so I will need something like a WS-C3750G-12S or a 4500 series chassis.  Thanks everyone for their input.
Thanks.