I have a Solitaire with the Tektite LT-3. It's not too bad, I guess. Still, I think that something like the Arc AAA or the Peak Matterhorn would be a far better bet for not much more money than the combination of the Solitaire and the LT-3.

The LT-3 keeps the Solitaire head from screwing all the way down, and mine wouldn't turn off reliably until I put a different, thicker spacer on the bottom. The LED color isn't great, the brightness is a bit better than the Solitaire (that's weak praise!), you aren't supposed to use the 1.7V LiFe batteries, and the anodizing on the Solitaire isn't very durable.

I got the LT-3 because I already had the Solitaire, but if I had it all to do over again, I might just get that Peak.