First off, I'm a fan of the Gerber Infinity (I keep a couple in my kit) but I'm not sure it's that great a choice if this is going to be the BOB or EDC flashlight. With today's LED technology, the venerable Infinity is kind of stuck in this awkward middle ground now--it's a bit big for the amount of light it can generate, and it's also not very bright at all.
For EDC, it's a bit big for pants pocket carry (at least to me). There are a lot of good 1xAAA lights that can go brighter or can last a good long time (the ever popular Fenix E01 is one example, or my EDC, the E05) and are very unobtrusive in your pocket. For a BOB, it's a decent choice for a long running 1xAA light in dark conditions, but you don't have the option of going brighter with it.
I think we've gotten quite spoiled by how bright a single AA/AAA light can go now but if you think you might need the extra output, it's nice to have the option while still having a long running low mode. Well, it really depends on the kinds of situations you think you might be using it in.