I had both the C320BEE and C325BEE. The upgrade was well worth it for a few reasons that I felt were worth keeping in mind based on how I wanted to make use of whatever I upgraded to:
1: Generates a LOT less heat! Consumes less power too.
2: Takes up way less space. The 3020 is Wii sized. Can lay flat or upright. The 7050 is quite a bit bigger due to the direct digital components, WiFi built in and networking stuff and larger power supply.
3: Total removal of all analogue source connections. Play something and pause it, then whack the volume up to max, there's dead silence. Any ambient noise that comes out of the speaker or headphone is only going to be whatever is on your media being played. This is great for well mastered tracks but you will be more aware of poor quality ones
4: Bluetooth aptX = CD quality music streaming from phone/tablet.
5: Network streaming, Spotify and with the latest update you get TVConnect too.
I am, it's up on AVF at the moment but if I don't get asking price I won't sell it, will most likely use it on another PC when I upgrade my speakers.
