I was thinking of trying the Descender seatpost instead of a quick release. I haven't seen any reviews on them yet but I've seen a couple of them on the trails and they seem slick. When you want to lower the seat just pull the knob out and it drops and locks in a lower position. Then when you want to raise it you stand off of it and just pull the knob and it pull the seat to the top again. It's a bit more expensive than a clamp but if you can afford a Moment what's another 200. The weight is only about 70 grams (2.5 oz) more than a Thompson.
The also have a Gravity Dropper which has a cable that runs to a handlebar switch to release but that's to much junk for me.
Get the Gravity Dropper, very convenient and safer than the descender. With the bar mounted switch you'll use it much more often. Wiyh the Descender you have to reach under the saddle which is not always possible when you need to.
the gravity dropper seams like some Rube Goldberg inspired device, don't get me wrong it looks like a really good idea, it just looks a little weird to me. And for some reason i cant shake the image of that thing shooting up and smashing the boys i really doubt that would happen but just the thought makes me cringe. (im just kidding BTW, its a good product but not for me)
If you go QR, get a Hope. Much better than a Salsa (I have one of each). Hope had a knob for no tool adjustment, can be closed in any direction, and is much smother with the brass bushing. Might even be cheaper.
And I think the interference with the carbon cross bar is only on smaller sizes. Not an issue on a large 05 at least.