Regardless of what program you prefer, getting a good quality render is a lot about setting up lighting. Setting up lighting could take as long as setting up the scene.

After a movie has finished check out the credits. Boring? Hell Yes! But there are a LOT of people's names listed in the lighting department, and sometimes many different types of lighting are mentioned.

A couple more tutorials on Daz Studio lighting in following links.

http://iamuman.deviantart.com/art/Realistic-lights-in-Daz-Studio-153461863

http://www.cooltuna.com/blog/2009/04/27/introduction-to-lighting-for-poser-and-daz-studio/

If you plan to do a lot of postwork (in photoshop, gimp, whatever) on the rendered image then consider that lighting may not be so important.

Tip: When setting up the main scene lights. Do test renders with shadows turned off. Shadows take a long time to render.