Your D16 is a capable motor of a turbo, and produce quite a bit of power on a stock block (around 200whp)
but your transmission will definitely hold you back. Superchargers are ok, but if your looking to make power, go with a turbo.
In fact, I will bet that your automatic transmission will go out first before your engine if you decide to turbo it. I personally think you should convert to manual and boost the d16 afterwards. You can beef up your tranny by upgrading to a level 10 torque converter, but they are quite expensive as well. You can look for it right here:
www.levelten.com
A b16 will be able to produce a lot more power than the d16, however, you will be paying a lot more for it. Plus, if you blow up your d series, they are cheap motors to replace since almost everyone tends to swap them out where as b16's can be a tad bit more expensive.
www.turbod16.com is a great site regarding boosted d series if your interested.
Hope I helped.