You seem to have learned the disadvantage with inappropriate damping. Sounds like you need both more compression damping (less "bobbing" and diving) and more rebound damping (less bouncing). Maybe you also need stronger springs but at your weight, the stock springs shouldn't be too soft. So perhaps try thicker oil. Lots of experience with that fork here: www.mtbr.com/reviews/Front_Shock/product_21579.shtml.
If you haven't cared at all about tuning, then I suggest you try that first. But in case you decide to go for a new fork, make sure to get one with hydraulic damping and not any type of elastomer or MCU (MicroCellular Urethane) damping. Also, in order to balance compression and rebound damping, you will want rebound adjustment (you can always alter both simultaneousy by changing oil weight). And get the right travel length.
Take this with a grain of salt, but I have understood that the market leaders and the ones with the happiest users among forks with hydraulic and adjustable damping are the following:
<$300 (decent damping)
any Marzocchi MX
any Manitou Black
<$400 (significantly better high-speed damping)
Fox Vanilla
<$500 (best damping you can get today)
Marzocchi Marathon
Fox Talas
*** Edit *** : Remember, though, that even the best fork can perform crappy if you don't tune it for you weight, type of riding, and preferences.
If you haven't cared at all about tuning, then I suggest you try that first. But in case you decide to go for a new fork, make sure to get one with hydraulic damping and not any type of elastomer or MCU (MicroCellular Urethane) damping. Also, in order to balance compression and rebound damping, you will want rebound adjustment (you can always alter both simultaneousy by changing oil weight). And get the right travel length.
Take this with a grain of salt, but I have understood that the market leaders and the ones with the happiest users among forks with hydraulic and adjustable damping are the following:
<$300 (decent damping)
any Marzocchi MX
any Manitou Black
<$400 (significantly better high-speed damping)
Fox Vanilla
<$500 (best damping you can get today)
Marzocchi Marathon
Fox Talas
*** Edit *** : Remember, though, that even the best fork can perform crappy if you don't tune it for you weight, type of riding, and preferences.