Actually the Peavey 60 is fairly shallow....9" if I recall correctly. It's not too bad weight wise either- it's the mono version which is a bit lighter than the 60/60 by several pounds.
I was using a shallow 6u rack, but I hated racking the power amp separately. No one makes a shallow 8u though, so I went with what was available (I found a really good deal on it locally).
It's a touch front heavy, but I marked the case so I know where the front is so I can grab it accordingly. The nice thing about the extra space in the back is that I can keep all the cables neatly coiled and stored instead of cramming everything back there. Plus, as carsnguitars58 noted it's the perfect height/ size to put my cab on!