I run an A4000, same CPU since 1993. 16 MB "fast" on the mobo and 48 additional on the Fastlane Z3 SCSI card. Retina Z3BLT graphics card and Ariadne 1 ethernet.
The OS is OS 3.0, running on top of 3.1 ROMs which I bought in order to install OS 3.9, but I've never come around to that, since its advantages over my current, heavily patched and extended system are negligible.
My favourite packages are:
THOR - Thule Offline Reader. It's really the best news/mail/fido/whatever reader in existence, bar none. Some people swear by YAM, but it's not flexible enough for me, and the interface is not to my liking, either.
ArtEffect - It's the closest thing to Photoshop there is on the Amiga, and whatever the advantages of the other art packages on the Amiga are, I was reared on Photoshop. Can't really get myself to like Photogenics.
ScanQuix - used in conjunction with ArtEffect. Finally a working modern scanner solution like on the Mac or PC.
PPaint - It's like DPaint, but more modern. I just wish that it weren't so bloody slow.
KingCON - Makes every other shell/console handler seem like pure stone age.
IBrowse - People often complain about how Amiga browsers don't support this or that HTML or Javascript feature. But IBrowse has so many functions that it'd smash the PC browsers to bits if those HTML technicalities were fixed. Who needs popup killers and all that when you've got IB?