I agree with both of these posts... I just started fly fishing this spring, and have done fairly well on the bass and panfish in GA. Popper bugs are a great way to go for top flies for the panfish... you can get a 5 pack of them at Walmart for a few bucks, and you wouldn't have to go to a fly specific shop. As for the bass... I have done really well with popper bugs, and streamers like clouser minnows, and woolly buggers/leeches. I just started tying some of these flies too as they are easier to tie larger flies than trout flies (still haven't figured out the trout yet). Just like using spinning/casting lures... try to get a good selection of colors for the streamers. I have done really well with chartreuse woolly buggers, and white ones (tied with my dog's tail hair).
If you get into it a little more, and start tying flies... I am always interested in swapping flies (keep in mind, I am not a professional/artist... but have caught a number of fish on these buggers).
Cheers,
Pete