Hi Robert,
I also really like the new look and feel of the new 300 series.
We are trying to use a standard look and feel for the GUI on the small business products.
So the Small Business Routers, WAPs.Switches, Security appliances that are coming online and are online for sale at the moment, all have the same look and feel. I think the ESW switch, because it is really only used on UC5XX will stay the way it is, I have heard no mention of upgrading it's GUI.
Anyway currently, the ESW family of switches has an advantage of being managed by Cisco Configuration Assistant (CCA).
Robert, for other folks that look at this posting, I will include a link below to the newer 300 series product comparison pages.
As you will have noticed already, the 300 series is generations ahead of the older SRW series switches, even allows for Layer 3 routing between VLANs.
But for consistency of changeover from old part to new part , if you ordered in the past a part number SRW224G4, the 300 series replacement is now SRW224G4-K9-XX (where XX can be UK NA EU.......... country code of some kind.)
http://www.cisco.com/en/US/products/ps10898/prod_models_comparison.html
regards Dave