Questions regarding all my Apple computers.

[rogtha@delphi.com]

Hello. This is what I have:
 
Computer 	RAM	   ROM  	Accessories
--------	---	   ---		-----------
1978 Apple ][	64K 	   Applesoft	Disk II card, parallel printer
		(48K on	   replaced	card, 16K w/Applesoft card,
		m-board	   Integer ROM	joystick cable adapter, 3 CH
		+ 16K on   on m-board	Products joysticks, Anko
		mem card)               joystick, Mitac 5.25 drive
 
1983 Apple //e	128K	   Applesoft	DuoDisk card, 64K w/80 col. card,
		(64K on    		Monitor //e, DuoDisk
		m-board
		+ 64K on
		mem card)
 
1981 Apple ///	256K	   SOS (???)	ProFile card, ProFile, Monitor ///
		(not sure
		where the
		memory
		comes from
		on this
		monster)	
 
1984 Unitron	64K	   Applesoft	Disk II card, 16K mem card, Sanyo	
		(48K on			VM 4509					
		m-board
		+ 16K on
		mem card)
 
1986 Laser	128K	   Applesoft	All ports and built-in 5.25, C.ITOH
     128EX				Chroma Pro RGB
 
Sinclair ZX80	1K	   ???		(Just thought like mentioning this one.
:)
 
 
All machines are in excellent shape, function perfectly, and are *not* for sale.
:P
 
 
What I'd like to know is:
 
Where do these computers (each of them) stand, in terms of reliability and
practicality?
About what percentage of Apple software (excluding Mac software) will run on
each of these
machines? Which should I expect to fail first?