Out of all the SolarForce's mentioned, the L2P is the only one that will tailstand, if that's at all important to you. I've used my L2P for around the house stuff like under the sink repairs, and I'm sure glad that it tailstands! Also, if you're like me and sometimes go camping where there are outhouses, it's nice to have it tailstand to illuminate the whole inside so that you can see what you're doing - and keep both hands free and on-task.
For quality, I'd say you'll find concensus on CPF that Malkoff drop ins are right up there. "Best" drop in though? You really want to think about what you want your light to do. Think about whether you want a super bright high, very low low, what tint may suit your needs best, whether having a lot of spill would be beneficial to you... if you don't know where to start, just describe how you plan to be using your light and I'm sure you'll be fed lots of great ideas.
I've used my L2P on very long (>6hrs) night time hiking trips through pouring rain in the back country - scrambling over boulder fields (dropping it a couple times), climbing down waterfalls, fording thigh deep rivers... and it stood up to that just fine. They do have o-rings at all the common places, so keep them lubed up and you should be fine for that sort of use. Like Norm said - it's no dive light. Don't use it like it is.