Custom Product Builder check out experience -- 2

Link to Video explanation/walk-through : [login to view URL] I am looking for a custom check out experience where the visitors can select their parameters and a price will be configured. Needs to be light, fast, graphically beautiful yet simple. There is a big emphasis on being able to be used with multiple sites offering different types of products. split sreen. Left side displays chose package with badge and features. Right side displays variable parameters. Footer/Lowest row displays all packages from least $ to Most $ and can be scrolled. -As parameters are changed the L side display changes accordingly -I enter the parameters for them to choose from. -looking for a stand alone solution that I can use with multiple websites all with different parameters customers can choose -features- some features can be increased or decreased if it is amount based. example 5 websites, or $1500 or 15 directories- increase/decrease will change displayed package -can put this on any page -can upload package images or input package names and it will type over badge -ability to select badge image or upload custom image per package or as default for all packages offered in that cart -ability to add features -input equity scale -input term length -as parameters adjusted ( using sliders and/or +/-) the price adjusts --- 2nd sale checkout- once parameters are chosen and click checkout, offered discount to upgrade or continue with checkout --- show total due. last option to prepay- offer discounts based on term. Would you like a discount. discount % slider. as slides prepayment amount increases -- all data can be printed off by sections, all responses together, invoice, order summary, or use inputs with mail merge to fill out and email documents to client.