Dammit, wish I had seen this about 4 months earlier.
All I can say is, I can't fully discredit the Silverstars. Unfortunately I don't think I've ever seen the Xtravisions in my local stores.
All I can say is in my mom's practially pitch black neighborhood, I felt I could see easier.
The other options recommended are probably a better solution. All I can say is the Silverstars are better than the stock ones I had. Although, that in of itself, is probably not a hard thing to do.
If I could strap a couple of maglights to my front bumper, I think they'd be better than the stock lights.