If you want to follow the pack, the straight six or a sbc, is the ticket, but if you want to stand out in the crowd, the 305 V6 will get a lot of attention, conversation and questions...
As a commuter, the I-6 or sbc, is the better choice, from an economy standpoint, but as Markeb stated above, your personal preference will be the determining factor, based on your wants, needs and desires.
There are fewer and fewer of the 305 V6-equipped GMC trucks still rolling, so you would be somewhat of a novelty at your local cruise or show!
