I've owned and liked all of them in different eras, but I think I'd have to pass on the E90 and 9300 - I've become too used to modern conveniences like:
- over-the-air firmware updates
- microUSB charging
- decent cameras
- 3.5mm audio jacks
- high speed USB
- the extra codecs and usability tweaks that came with S60 3rd Edition FP2 and beyond (e.g. WMV/H.264 support for video)
- quad band GSM and triband 3G
- smaller and lighter hardware
...to give them up!
I'm starting to think that the N97 Mini will be my next phone, and first "Communicator".
I just wish Nokia would make a white one...