The main difference between the Redsnappers and Gitzos, will be with weight and sturdiness..series 3 and 5 will be carbon fibre, whereas Redsnappers appear to be alloy..
I have the GT3540 XLS, very pleased with it, considering its maximum height is almost 2 meters and the fact it has a full sized Really Right Stuff ballhead, it is lightweight. It has four leg sections, 3 will get me to eye level (I'm 6 foot), so have spare leg section for different compositions/perspective, though I think I'd have to take a step ladder with me to use that
I paid £479 for the legs and I won't be getting another tripod ever again. Now I know 7 tripods later (within 18 months), you could be excused for thinking yeah right, but I do 120% mean it this time. They're that good, probably the reason why you don't see many
second hand..
As has been said above, the G-lock system is very very good IMHO and quiet as well, which is quite easily overlooked if you're looking for a wildlife tripod...completely faff free - a quarter of a turn anti-clockwise, pull the leg down then clockwise a quarter of a turn..is then locked solid.