Excellent info!!
I really appreciate the help.

One last question is regarding the terms Nubus and PCI....
I'm kinda confused what that means.
On my old Mac, I bought a $50 add in card that let me add an extra monitor. I vaguely remember it being a Nubus card??
If I upgrade to the PCI versions of newer macs< does that mean having to get a new upgrade card to run multiple monitors or wilL i BE ABLE TO just re-use the card out of my old computer? (after using multiple monitors Im kinda hooked on em and would regret switching back to asingle monitor again. I'm also wary of this whole usb stuff.... I'm using all scsi periferals like my printers and scanners and wouldn't want to get into the expense of upgrading everything else too.
I'm seeing some great deals at CPUsed in Toronto on older used computers like the 9500, 8500 7100 etc.... and I guess what I'd be inclined to prefer to do is just swap my older machine, and just slip in a newer one with a little hassle as possible.