Chloe, as far as beam pattern goes, I’ve found that DC-Fix can give lights a really nice floody pattern. I put some SC52 beam shots up, comparing the normal beam to a diffused beam:
I mention it because you seem to enjoy the Preon P0’s flood beam, and have shown interest in other floody lights.
The best light I’ve found for “replace both a Convoy S and a keychain light” is probably my CNQG brass light. It’s about as small as you can get for a 1x18650. Not exactly keychain material though… Bright or small — pick one.
gregs656, I didn’t like twisties at first. I’ve gotten a lot more fond of them though, and less fond of clickies. Part of the reason is because twisties are silent. Another reason is that it works more easily with a handshake grip instead of an overhand or cigar grip. The SC52 gets around that with its side button, but ZL’s button designs have gotten so stiff and recessed lately that they’re hard to activate sometimes (especially with long nails). … which brings up another twisty benefit — no accidental activation in a pocket. They also seem easier to waterproof, and less likely to wear out over time. OTOH, electronic clickies like Zebralight allow a richer UI.
I’m not sure what I think about combo twist/click UIs like the D25A has. I ordered one though, Ti 2014 model with Nichia 219, and I should be able to say more after it arrives. (currently waiting for new stock, ETA unknown)