What does "main computer" mean anyway? I have several computers and use them all regularly. My work machine is a PC because I have no choice, but I'm not considering that. My Beige G3 acts as a primary mac for me, linking the old and the new (since it has a floppy, a CDRW, SCSI etc) but last weekend I spent more time on the PM 6100 than any other machine, and there have been many weeks where my Replica 1 (Apple 1 clone) has been my main computer - but I didn't notice that in your options! 
I've just reorganised my entire collection and set it all up very nicely. I've been waiting for the 68kmla to come back up to post descriptions and pictures etc (since it's mostly Apples and 68K macs). Amazing really, I actually have more machines connected and running than before (15 now - Replica 1, Apple IIe, Apple IIc, 128K, Plus, Mac II, LC III, PB 140, PB 170, PB 180c, Q650, PM 6100, PB 1400c, G3 MT, iMac 350), but it seems like my office is almost empty! The trick was to move our old dining table into the room - the computers fit nicely on top and all the previous mess packs up neatly underneath.
Ken
I've just reorganised my entire collection and set it all up very nicely. I've been waiting for the 68kmla to come back up to post descriptions and pictures etc (since it's mostly Apples and 68K macs). Amazing really, I actually have more machines connected and running than before (15 now - Replica 1, Apple IIe, Apple IIc, 128K, Plus, Mac II, LC III, PB 140, PB 170, PB 180c, Q650, PM 6100, PB 1400c, G3 MT, iMac 350), but it seems like my office is almost empty! The trick was to move our old dining table into the room - the computers fit nicely on top and all the previous mess packs up neatly underneath.
Ken