If you're not looking for a
dna chip, then my vote would be for the Pulse 80w. Some folks report dismal battery life with it, but I have no problem with it using it at 30w, with a Sanyo 20700B.
I have a few Therion BFs, and an Inbox V2, but in all honesty, I haven't used them since I got the Pulse 80w.
You can't beat the Pulse for an 'out and about' carry
mod. I've dropped mine on concrete several times and it didn't even chip/scratch the outside of it. Panels went flying, bottle came out, drip tip rolling away. Put it all back together and it's as good as new.
I like the Therion and Inbox, but downside to the Therion is the battery change is a PITA. Inbox is very likeable as well. These days I just prefer a light, druable and inexpensive Pulse 80w. I expect prices will drop soon when the Pulse X is released. The Pulse X (mod only) looks like it will run close to the same price as the 80w. And you can download a firmware update for the 80w once it's released as well.
Have to admit though, I am a Pulse fan boy, lol. It's been my favorite setup since I got it, and I already have a pre-order on the Pulse X.
Over Labor day, I think MyVPro had the original Pulse for like $18.99. Saw a few places that had the Pulse 80w for $39.99. Hard to beat the price on either one.