if you are used to an a3000 with a vga monitor you will be dissapointed with an a1200 with anything but a large tv, or a scandoubler. there is a reason paople are always looking for them here.
i had a full a1200 setup with an nec3d monitor and i sold it to get my 3000. now i have a video card too and there is no looking back (ok there is some looking back, it was an amiga after all)
of course if i had my way (the old lady isnt reading this) i would have kept the 1200 and gotten a 600, 500, 4000 and maybe even a 100 and 2000 as well :-D