This is an oft discussed topic. I just completed some tests that may be helpful to others facing this decision. I've just entered the digital world w/ an OM-D. Own some tripods that have worked well for film for years including a Gitzo Weekend Performance (44.4 oz & 62.5" max. w/ no head) & a Velbon Maxi 345E (28.5 oz & 60.5" max. w/ no head). I use the no longer made Velbon for backpacking & the Gitzo for everything else & these have worked fine even for my old Mamaiya 645. Having bought the MZD 75-300mm, I wondered if I needed to upgrade my tripod. So rounded up a couple mid-price carbon pods - Promaster C423W (41.5 oz) & C429W (58.9 oz) to compare to my svelte aluminum pods. These carbon pods are massively built in every way from top plate to foam grips to bag hook to huge leg locks. Long story short, all 4 pods had no problem holding the OM-D @ 300mm for a 1 sec. exposure even with fully extended center column! Of course, the lighter the tripod the longer it takes for the camera to stop shacking after changing the shutter speed. All tests were done w/ IS off & manually focused. So my conclusion is there is so little vibration in a mirrorless camera, you don't need much of a tripod for stability. Wind is another issue but there will always be a wind strong enough to upset even the biggest tripod. Hanging a bag on a light pod (w/ the center column down) will provide as much stability in a wind as a bigger pod so why carry the extra weight all the time? So I went looking for something to replace my Velbon since it does not allow very low shooting w/ splayed legs ore reversed column. My goals seem modest enough - 4' max leg height, 5' max height & 2 lbs weight w/o head. There seems to be only 1 pod out there that'll do that: the Slik Pro 634 CF. If you are willing to accept a few inches less height or a few more oz, there a half dozen more choices from Oben, Sirui, Redged, Indur & Gitzo. But still not many options. Love to hear if any of you have found a few others but for me the conclusion is the market has committed tripod over kill and mirrorless owners can easily get by with much less. Lets see if the market responds to our needs. Hope this helps ya!