a few months back i sat on the bob church type all day and my **** hert like hell and my back.
the airflow tld are amazingly comfy.i don't have any experience with the lureflash but they seem very cheap at around £70.
you can buy a tld from harriss sport mail for about £70 but you will need ratchet straps to get the best out of it.
also if your boat has open seats then this is fine but ours on our local reservoir are double skinned,so effectively if youve got this type of seat then you need to position it in the middle and move when your starting the drift.
i will be making my own within the next few weeks using those wise type seats and a 360 rotating bracket so watch this space.