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I think it is better for you to get just a normal alluminium tripod, rather than the carbon fibre one. You save more than half for that. I don't think the Gitzo 2 series carbon fibre is a good choice, as it is just too light and not stable enough for long lens. If you want carbon fibre, then go for the higher range 3 series model. Once you step into carbon fibre, the price difference is not much, so better get the 3 series. You donno want to buy too many carbon fibre tripod, right? For lighter/smaller model, you can just get the Manfrotto 190 or Gitzo G12xx model, no need CF.
If you don't mind alluminium model, my preference is the Gitzo G1224 (2kg+, good for lens upto 300mm I heard), or Gitzo G1325 or 1340 (this is the one I have, but not available in Singapore). I like G1340 for it can go down to ground level, having wing lock type. Price? check my webpage.
You have to ask yourself if you want a 3 sections or 4 sections tripod. I prefer 3 sections as is faster to set up, but is longer to store.
I think one person need at least two tripods (for me...at least), thus you might want to consider getting a more stable one first (Gitzo 3 series), and later get a lighter one for travelling (Gitzo 2 series).
Ballhead, since you have plenty of budget, then get the best and buy only once. I never heard people regret buying Arca Swiss and then upgrade to something else, but heard many complaint about other brand and upgrade later to AS.