I currently have a single MiNewt. I've been eyeballing the X2 headlamp "upgrade" NiteRider" offers on their site for $49.99. Not that I'm having issues, just that I find the idea of more output for a minimal investment appealing. Just more to fill in some of the shadows on the road, so to speak. Has anyone actually gotten the "upgrade" and (pardon the pun) seen a noticiable difference between the old & new? Is it a reasonalbe investment - enough to relegate the old one to the "bike stuff" box?