Whilst we never say never, I would always land ahead. Genghis, there have been a number of fatalities in the States, where individuals have attempted a turn back. In my type, Beech Bonanza, a number of studies have been undertaken, (weather dependent), and it seems at least 1200 feet is necessary to even attempt the procedure.
As you say, 95% of the time I would land ahead also - I took the view at the time that I was in the 5% ! Given I'm intact, and the aeroplane re-useable (or will be once we've got the engine sorted), I stand by that.
I'm interested in your 1200ft figure for the Bonanza - I spent quite a lot of time "playing" with a Piper Warrior a few years ago, and came up with a figure of about 600ft. The Bonanza is a bit bigger and heavier than the PA28, but I'd not have thought sufficiently so to need to double the height.
G