Those sound like enough advantages to justify one right there. The one-piece post and head is an obvious plus since there is no seam or weld to separate and the warranty is also a benefit but nearly never needed.

I chose the Thompson (set back) Elite since it was one of the few Al posts available in 31.6 mm when I bought mine two years ago. It's quite light, very strong, and was less expensive than the carbon posts being offered at the time. I still don't think carbon is a desirable material for seatposts and the Thompson has been great. I don't see that the Thompson "Masterpiece" series is worth the significant cost increase for a minor weight savings.

For another bike I bought more recently, I got an Easton EA50 Aluminum post in 31.6 mm. It was significantly less expensive than the Thompson but also has a one-piece post and lower saddle clamp design with a two-bolt saddle adjustment. It has about the same set back as the Thompson "bent" post. It's only available in an MTB 350 mm length but it was easy to cut down to about 250 mm for road bike use and doing so saved 60 grams. Even shortened, it's not as light or as elegant as the Thompson but has done everything a seatpost should at very reasonable cost.