Had always thought complementary angles were demonic, never knew I wasn't alone

.
Will have to go against the trend and say Da Vinci Code was the better of the two. There were many elements of the book I hated about A&D including the mediocre ending that reminded me of the cop out of an ending in
The Grail Conspiracy. IMO, there are one of two reasons you would want to read A&D:
1)
You like Brown's writing. If so, then the Da Vinci Code follows the same formulaic writing we see in many of Brown's books (I've read them all) including A&D, but DVC is easily his most refined yet, so its a no brainer for me to go for that one.
2)
You like the subject. If you're interested in the topic of Illumanti, A&D is basically child's play compared to
Illuminatus!, although the latter requires a lot of patience (800 pages) and isn't easy to read. So I'd say skip Brown altogether if you can stomach this classic, if not, then get A&D.
Just to get my two pence (I'm in Scotland atm

) in, here's how I'd rate all of Brown's books:
1. Da Vinci Code
2. Digital Fortress/Angels and Demons
3. Deception Point