I bought an ex demo 3042 a couple of months ago and love it. Like tommysuriady said the colours are beautiful. I also looked at the 1024 and the quality seemed as good but my decision was made based upon previous experience with Mimaki (I also have a JV33 printer and CG160fxII cutter) all of my Mimaki machines have worked flawlessly since I have owned them which is about 4 years.
With primer I use metho (denatured alcohol) on almost everything even if it doesn't need it, and for anything that requires it I use the mimaki primer. . We chose the hard inks LF-100 (i think it's called that) over the more flexible for the durability. Also the local support company go above and beyond to make sure we are well looked after.