I shoot a lot of EX3 material and have a great Sachtler DV6SB system with the carbon fiber legs. It was pricey when I bought it and it has lasted, taken a beating, still works perfectly.
That said...I do a fair amount of 2-camera shoots and rent a buddy of mine's EX3 for reverse shots. He has a Hotpod. Heavy, bulky but...it is so nice to have such a solid mount for the camera. Butter smooth pans and tilts. Working by myself with it would be a pain BUT it is a better tripod from the "capturing an image" standpoint.
I'm also a huge Vinten fan. Those two brands are my go-to choice when I spend my own money.
I have nothing nice to say about Manfrotto tripods. In my experience, they don't last and are second rate. Make that third rate. Save money now, then spend more very quickly not too far into the future. Or put up with a rattle trap, putting your camera at risk. I won't bore you with more negative comments from me about Manfrotto products.
I will strongly suggest whatever tripod you buy, get one with a mid-level spreader. It's just as important as making sure you have a good, smooth action head.
We all have to balance cost with need. Just make sure to err on the side of "long term thinking". Spend good money now on a good tripod system which will last you beyond your current camera.