Dell Powerconnect 5548P software options

Hello,

I recently inherited an infrastructure that includes many Dells switches, which I have little familiarity with. I'm wondering if someone can point out the model that Dell uses for their switches and tell me what software I can run on the 5548P. For example, I know that I like the software that runs on our 7048P models, version 5.1.9.3 and I dislike the software that runs on our 5548P, version 4.1.0.16. It seems that software version 5.1.9.3 is much more feature rich and has useful features such as filtering results (pipe | include). 

What versions of software do the 5548P switches run? Am I due for an upgrade? Will the 5548P run software that is more feature rich like on the 7048P version 5.1.9.3.

Thank you!!

Rob