I just got a Bass Pro Shops gift card, and I'm thinking I'll use it to buy my first duck call. I'm not an experienced waterfowler, so I thought I'd ask around in here on some of your thoughts on what makes a good call. Are they breed specific? Which ones work well for our ducks? Which ones are easiest to learn on and use? Etc. Also, I'm looking at spending about $30. I see many calls for double, even triple, that. If my budget is too low for an effective call, and it may well be, I'd like to hear about that, too.