I'm working towards direct fire on the stove top, with a separate mash and lauter tun--all metal.
Just finished my Blickmann false bottom mod for the lauter tun, a 3\8 in copper hoop standoff using copper tabs and lead free solder, with a 3/8 in copper tube bent up and over and down to a ball valve for siphoning.
The mash tun fits in the oven for the long rest, direct heat on stove top for the steps. I have a 5, 7.5, and 9 gal stainless steel pots for sparge, mash/boil, and lauter respectively.
I'm still waiting on CozyDayz for the 9 gal stock pot, great price ($80 shipped), but slow service (ordered on Nov. 5, scheduled to arrive Nov, 29....)