Planning on upgrading to sport rear sway bar. Any recommendations?

[TurnAround]

The new front struts and rear shocks are on the X. It made a whopping difference in handling. I have .. I'd say.. 95% of my old X back! Thanks for all your advice.

Now I think I'm going to go ahead with replacing / upgrading the rear sway bar. I have the non-sport suspension.. which the NS springs and shocks are perfect for our roads. But after learning about sway bars from you guys I can see that upgrading the rear bar would be a reasonable compromise to get a more fight against body roll, at a small cost of rear ride quality.

My only question is, go with the BMW OEM sport rear sway bar, or go with after market? Recommendations? I want to reduce roll, but not go to far, ruin the rear ride qual, and then regret the upgrade.

I'm leaning (Ha! pun!) towards the BMW OEM sport.

Keep in mind.. I don't have sport springs and shocks. So, going with the OEM sport bar with my NS springs and shocks would not produce the same handling and ride characteristics. It would be something 'in between'. So.. I / we need to factor that in.

Thanks bros!