This is a variation with a slight greenish-gray tone in the HDRI dome and in the two spotlights. I wanted to see if I could soften the shadows a bit more. Both of these renders only took about 17 minutes for 1024 x 768.

BTW- HDRI lighting creates NATURAL soft shadows which render faster (I think) than increasing shadow softness in standard Vue lighting set-ups. The overall rendering time is actually much less with HDRI.

I also figured out WHY the H2 Hummer took SO LONG on rendering the wire mesh! I had shadows ON in my two spotlights- IF I had turned off the shadows it would have
rendered MUCH FASTER. So that's another tip to remember with HDRI lighting-- turn OFF shadows on your accessory lights...