i have also looked at Feisol, it is very strong, firm and sturdy. I doubt if GT1542 will give you much improvement. I think you are paying a premium for the "Made in Italy" tag. if you dont mind the weight and length, i think Feisol is a good choice for you.
but the 中軸 cannot be lowered, it makes the whole tripod very "swing" and loose.
this one only costs $1380 from SSP, it is great for DC or 4/3 camera, but definitely not suitable for SLR.