What is the best ecommerce shopping cart

I have found out that there is no right or wrong answer for your question. It all depend on many different factors such as how technical inclined you are, or even what type of business you are running.

I have used zencart and open cart and my favorite is opencart.

It is easy to configure, easy to modify, and easy to manage. It also is Sri friendly.

Just my 2 cents

Magento is pretty nice if you are looking for advanced configs and multi store/vendor capabilities, and Joomla's is a really nice CMS, both offer complete integration across the board and all the SEO meta-meta-meta tagging for anything you could dream about

You can't go wrong with Open Cart. You can get some great looking themes on websites like Theme Forest for around $30-50. The back end can be a bit confusing at first, but you'll get the hang of it.

Asking what platform to roll with, without any qualifications first, is like a random stranger asking you what car they should buy. If they didn't tell you their age, hobbies, family status, income, etc, how could you determine for them if they need a minivan to haul the kids, or a pickup to tow their boat, or a sports car because they're young and brash? You would be unqualified in determining that for them. For this reason, it is foolish to pick a cart first and then determine how to set up a store; rather, you need to determine how your store will be set up; what features you NEED; what features you *want*; and then determine from there which platform best meets your needs.

Each platform comes with its own strengths and weaknesses, and to determine which one is best for you, you'll need to determine what you need in a cart..
Magento has a steeper learning curve than most of the rest, however it is the undisputed most powerful, with the largest library of 3rd party support. There's a reason why more than 1 of every 4 stores online runs Magento.
Are you selling only simple products? Any cart will work for that; I'd recommend Shopify for ease of use (though it is paid hosted; a free alternative that you can host would be OpenCart). However, Magento does not have native support for digital product downloads, like PDF reports or MP3s. You'll need a 3rd party plugin for that
OpenCart is nice, but it doesn't have a native import functionality. Their official documentation recommends 1 of 3 different plugins, based on what you need and how much you want to pay. So, if you have hundreds or even thousands of products, you'll have to create them all by hand in OpenCart or install a third party plugin for this basic functionality. Crazy, huh??
ProStores, BigCommerce, and Volusion all don't have layered navigation. That allows customers to sort categories and search results by things like color, price, size, style, material, brand, etc.
3DCart just got certified last year for a number of things: FedEx support, PayPal Payments Advanced, built-in autoresponders, etc. These are things that have been around for a couple of years standard on other platforms. I took them for granted; I didn't realize that other platforms may be so new to the game as to not have them.

As you can see, there are quite a few differences between the platforms, and each one has its strengths and weaknesses. It's important to listen to both the cheerleaders and detractors of a platform, determine what your store's needs are, and then pick a platform based on that.

i think ur best bet is to get wordpress install with a woo commerce plugi, it worked for one of my freinds so should work for you too.

I have tried zen cart, opencart and prestashop. I would pick opencart for its lowest learning curve to use and operate.