Planted Tank Guru
Join Date: Jul 2010
Location: British Columbia, Canada
As to Cories, you might consider Emerald Cories, or Peppered Cories - Bronze Cories are quite nice too, and I think you would like Panda Cories. Check them out.
Chocolate Gouramis are beautiful, graceful, brightly-colored fish which should co-exist well & peacefully with the other species you have mentioned, including the Rasboras. They're not jumpers to my knowledge. Ideal tankmates for them are smaller, slow-moving fish, as they are quite shy and can be a touch skittish at times. So they prefer a reasonably well-planted environment with some areas where they can rest quietly away from the usual hub-bub. Not sure how they'd take to bright lighting - I had mine in low/moderate lighting, but it should be ok.
Hope this helps.
Oh, and be a little careful with the total number of fish - the Gouramis are reasonably-sized, and the total number of fish you have in mind may be starting to approach the recommended max bio-load for a 50 gal tank.