Hey Dean, wood is very "subjective" to your taste. For example, some people really like apple wood smoked pork; I hate it. If it's mixed with a little hickory, it's OK, but I don't like it alone, as apple has a very unique flavor (at least to me). I love hickory on just about everything (it's "traditional" Q just about everywhere). On pork, I usually do a mix of cherry and hickory. Peach is also good on pork, especially with a little hickory mixed in. I even like oak! Bottom line: find the woods that suit your taste, not mine. Experimentation is the key - you'll find the combinations that work for you. There really IS a difference in wood smoke!
Here's a start: Brine a butt, and smoke it with the SI hickory dowels; you won't be disappointed. As your experience progresses, try some different woods and see what works for you. Just be sure to get good quality wood, like Gregg said; it does make a difference.
Good luck with your first smoke!