Dell Online Store Major Problem

I am a long-time Dell customer that has purchased 7 computers from the Dell Online Store over the years, but I have just about reached my limit with my recent experience. 

I have tried repeatedly over the past 3 weeks using 4 different computers, with 2 different OSs, and 3 different browsers to configure and order 2 new XPS computers from the Dell Online Store.  It has been the most frustrating e-commerce experience of my life and after having processed 1 order for $3.3K, I am questioning whether I want to continue beating myself over the head with a hammer to process the second order for $2K.

The problem is once I enter the configuration, any click I make takes several minutes to produce a response, irrespective of the system I use.  It is a problem with the Dell site, it is not a problem with my computer, browser, etc.  I have worked out a rhythm to get me through using a Chrome browser to configure while working in Firefox or another program (and yes, I have tried Internet Explorer 8 with the same result and I have tried it on another computer sitting here doing nothing else with the same result).  The last time I made it all the way through to the final click to complete the purchase before it choked and lost everything!!  Now I am trying again, but I see that it lost my login, which I didn't notice before, and which has led to loss of my cart.  The most painful wait of all is getting something into the cart, which can takes 5-7 minutes!!!

What is wrong with this site??!!  How can you possibly sell any computers this way??!!  Somehow your site manages to slide an image of a friendly-looking operator in Hyderabad across the screen, which I can't click on because everything on the screen is non-responsive during following any click I make.

Please, please, please, for your own good do something about this problem!!!!