Slik 624 CF tripod and Sirui G-10 ball head. The Sirui has a ultra smooth pan but the adjustment up or down can be finicky when you first use it. The rig is under 3 lbs with the tripod and head. It's been working well so far for the last 4 months and I've been playing this set-up in the winter weather here, -20*F to around 35*F.
It's supporting a Swaro 65, tines up ring and Canon A1300.
The slik 624 won't go high enough for you to stand upright but that is the trade-off for lighter weight, smaller tripod.
I've got the vanguard alta233AO. It weighs 3.5lbs but its very sturdy with a smooth head and I can glass standing if I want. It will be topped with a vortex razor hd 65mm as soon as Paul at Elknut gets them in.
I've had it for a couple months, I've been super busy so haven't used it alot but its awesome. Like you, I've put my eyes though about every optic out there and I can say this is at the top of the list. I'm getting the big objective this summer and I feel I'll have the ultimate set up.
slik sprint mini II w/minox MD50 scope. I took out the center post and added a stoney point "V" rest on a extra quick release plate for a shooting tripod. I think it weighs about 1.5# with the center post removed, has a ball head. I also have the slik pro ez (2.8#), which has a pretty decent pan head and would be better with a heavier spotter, but I never seem to want to pack the extra 1#.
I have no idea why using a tripod as a field shooting rest isnt more popular.
Nice set up, I have same tripod and head, I modded my 634 taking off bottom leg extensions and neck extension to make as sitting height only like the 624 so runs a bit longer than the 24 packed up but likely lighter without the extra set of collars. I have two of those heads and several extra feet so I can plug and play optics between tripod and window mount.