The Gardiner poles come in : CLX = Hybrid part carbon, part fibreglass.
: SLX = Carbon Fibre
: Xtreme = Hi - modulus carbon fibre
From top to bottom of the list = cheapest to most expensive / flexible to more rigid. What you want depends on your budget. But, but the best you can afford because your body will bear the brunt of a heavy pole overtime.
The SLX is a great pole for the money, light, more rigid than the clx. The Xtreme is the top class pole and the lightest and most rigid. Hard to beat. Check out their website for weight and length differences.
Oh, you could always buy a Brodex for longevity