I'm looking to buy either a T3, XO3, or a T4. The difference between the T3 and XO3 is very small, and as far as I can tell is in the tailcap and that the T3 has 3 more lumens than the XO3.....82 vs. 85. Both are about the same price. So why would INOVA make two LED's almost the same? As far as the T4 goes, it is rechargable and has a 100 lumen output from a 4 watt led. It is also $45 to $50 higher than the other two. Is 17 or 15 lumens worth the extra money? New to this and just searching for answers!!:huh2: