Well, we never did manage to figure out exactly what caused the crash. It could've been the new dog bones I installed, or possibly something on reassembly I put together wrong. But I couldn't find or feel any loose parts on the bike. The only thing that I could find was about a week or two after the crash I had my dad sit on the bike so I could give it a shake to find anything loose and I found that the only thing out of the ordinary was the tire on the back was low enough to almost be flat.
That being said, my Darksiding days are over, I was happy with how the bike ran and performed with the tire on, but I'm assuming the day of the wreck my slow leak had probably only left 28lbs in the tire. Cornering, IMHO, isn't the problem with the car tires. I think what it is is really checking the tire pressure before and during every ride. The side wall is much softer than a bike tire, and I cant help but blame the accident on my low pressure.
It was my first and only highway test run on that bike with the Darkside tire. So I don't think I'd recommend any car tire. The one that I used is the Nexen (second link down) but again, I'd bike the bullet and get the bike tire. Trying to save myself a few bucks cost me about $4800 (thank god for health insurance) and lets not forget the 5000 that was Venture. And even being down that much cash I still consider myself lucky because it could've been much much worse