you will get so many answeres to a question like that. everyone has there own reasons for using a certain cart. The best thing to do is reaserch, and ask yourself, do you want to do it yourself or hire someone, or a little of both. you can find great carts that you can set up and put the inventory in yourself and mabey hire someone to customize.

the best think to do is reaserch and try the demos and check out thier forums or better yet. call them and talk to someone.