Well first of all I am not a frequent english speaker so my spelling can be in somewhat wrong so my apologyes in advance for that.

With that said I have some doubts because I intend to buy a 2008 kona coil air and I wold like to replace the rear air shock with a decent enough coil shock (a manitou swinger 4 or six way - most likely 4 way) and I'm not sure of how the bike will handle after the replacement. The reason I'm asking this is because I know that the suspension system is tuned for the air shock (a rising or slightly rising rate in order for the air shock to give a linear feel). I'm not completely sure if I expressed the suspension rate corectly but what I meant is that the force acting on the shock as it's going through it's stroke will increase to counter act the shock's rising rate. I know that the shock used has a bigger air chamber to eliminate the end stroke ramp up, but from what I have read, that is only a slight improvement (the shock will still experience the ramp up).

Does anyone have any experience with this? Is it ok to replace the rear shock?

I have some cycling experience (I ride now seriously for 3 years) and only rode hard tails (well I rode some full suspension bikes but those were cheep supermarket bikes). I can handle medium jumps and drops and would like to go full suspension.