If you really just want to relive old classics, you'd still better buy a second hand A600/A1200, get a budget accelerator and CF card as Harddrive. These machines can be hooked up to the net if you want via a PCMCIA card and USB is possible via a clockport device.
Or, get a vampire accelerator (available for A600, expected for A1200). The A1200 vampire is expected to have USB/Network capabilities as addon hardware.