GameFAQs is a goldmine if this is about video games. Walkthroughs, reviews, message boards, the works. For music, check Allmusic.com — they have great write-ups and 'if you like X you'll like Y' recommendations.

My buddy got me into this and the best thing he did was let me try his stuff before I bought anything. See if you have a friend who's already into it, or check if there's a local club. Hands-on beats reading reviews any day.

Personal preference plays a huge role here so take my recommendation with a grain of salt. What I love, you might hate. But based on what you described, I think you'd really enjoy what I'm about to suggest.

Don't spend a lot of money right away. The industry changes constantly and what's considered the best today will be outdated in a year or two. Start with a mid-range option and you'll be happy.