It does really depend on what you want...
For me, I really love the form factor of the Rage/Attitude. The AAA vs. AA issue depends a lot on whether you use rechargeables or not. If you are using throw away batteries routinely, the AA clearly gives more energy for the buck. AAAs and AAs basically cost the same, but the AA gives well over double the energy.
For myself, I use NiMHs routinely with Alkalines for emergency backup. Since my battery cost is neglible for routine use, I really like the smaller, lighter, more compact body of the Rage/Attitude. You can toss this in the glove box or pants pocket and hardly know it is there.
I don't especially like the proprietary lamp assembly of the Rage vs. easy to find bulbs of the Tec40 but in the end, I've decided go with the lamp assembly approach 'cause I end up with a more compact light. I use LED lights for 95% of my flashlight needs (mostly the PT Attitude or ARC AAA on my keychain) so in the end, I'll be using very, very few lamp assemblies.
For a AA light, I definitely have chosen the UK 4AA AS2 over the Tec40. I owned a Tec40 and ended up returning it when it deformed my NiMHs so much (lack of springs in body) that they simply became unusable in the light. The UK 4AA AS2 is nearly perfect IMHO.