I'd be very cautious and recommend you weigh your use case before taking anyones advice that any NG Amiga can be a day to day, desktop replacement for a more mainstream machine like a Windows, Linux or Mac box.
I love my NG systems, but the idea that I could use them to do my day to day business on them is laughable. They are great machines for what they are, but the truth is I couldn't even get my daily work tickets off GDocs on either MOS or my OS4 machine. The browsers puke too much.
Honestly, and I know how much people hate the emulation route - it's hard to go wrong with an Amithlon or even dedicated UAE box if you are intent on running older software. I've got both an Amithlon box and a dedicated UAE machine (XP base, boots right into WB 3.1, never even see Windows) and most people would be hard pressed to even recognize they are emulated machines if they were parked in front of them if an old Miggy KB and mouse were there.