Full Sail

I'm finding that when I convert from RAW to JPEG in order to post within the 8MB max here I am loosing picture quality greatly. Additionally I am seeing weird color aborations especially along the blue and red border areas. I'm trying to capture these images in less megapixels to see what happens. I've also tried futzing with the contrast, hue, sharpness, etc. Unfortunately, you can't see how fan-f****ingtastic the RAW images look at full size.