Hi Meanwhile, welcome to CPF!! I'll be the first to jump in to say "Hold on to your wallet!!" /ubbthreads/images/graemlins/grin.gif
The new G2s come with a cliclie now, although not all the dealers may have them in stock yet, but you might get lucky. So, the G2 might be a good choice after all. I am not too sure about the T3, but depending on your need, if you require a light that will cut through smoke or fog, then an incan is definitely the way to go. Apart from the G2, there's also the UKE 2L, which is not as bright but runs longer. With both of these you can opt to get the Led drop ins to replace the incandescent lamp should you want to. Else, Pelican and Brightstar Koehler (sp?) makes some 2AA and 4AA sized lights that are quite bright, although not as bright as the G2.
Hope this helps... and see you around!! /ubbthreads/images/graemlins/smile.gif
Edit: Looks like Jayflash beat me to it... Anyway, somehow when you mentioned powerful 'beam' I seem to think of only incans... Jayflash has quite a few of the small Leds covered, so you're in good hands...