No, no, no. Forget the EO1 and the TK-701. Get the Kaidomain Buckle Light V5. Naysayers will tell you lots of horror stories about loose thread and crappy build quality. They are correct for versions 1 thru 4, BUT with version 5 Kai finally got it right. The build quality is up to Fenix standards, and it's more durable because it's thicker. I had an E01 and the tint was way too blue, really off putting. TK-701 is probably ok, but the runtime is poor. With the Buckle Light you can choose from three different runtimes--they have three different versions. I got the RT version which gets about 90 min on an NiMh. It rocks! Great tint and beam quality--very smooth beam with a nice wide spot and lots of spill. The threads are excellent. The electronics are potted in epoxy to prevent damage from drops. The anodizing is HAIII and is uniform and free of defects. I have nothing negative to say about this light. On the personal preference issues, the aluminum is thicker than most AAA lights, so it weighs a more and is thicker than most AAA lights; however, this make it more durable, so it's a personal preference thing. The different versions are the MAX, the RT and the XRT. MAX stands for max output and has the shortest runtime. XRT has the longest runtime. This is the one I got (the RT):
Bessiebunny gives it 5 stars too.
I hope that helps,
Nick