E-commerce solutions for B2B?

[RonSolo]

Just curious ... anyone know of any e-commerce solutions (ie. shopping carts) that include default features that meet the unique needs of a business-to-business (B2B) company?

For example:
- accepting purchase orders
- creating customer accounts on the back end
- preventing creation of customer accounts on front end
- guests can view products but not prices
- single order page where customers can enter multiple line items and then add all items to cart at press of a button (customer already knows the products they want to order)
- customer accounts can be tagged to individual salespeople, so salesperson receives email copy of order from their customer only
- kits: ability to create a "kit" that takes other individual products and creates a single product - and adjusts inventory accordingly

Anything out there that meets most of these requirements without having to go the customizing route?

Thanks,
Ron

[vetrivel]

you can better use xcart...
but need to customize.. then only you will get this feature ....

[RonSolo]

Thanks, Vetrivel.
I'm familiar with X-Cart. And, yes, customization is required, as with most shopping carts out there.

Just want to make sure I'm not missing something out there that can actually handle B2B sites without customization. Magento accepts purchase orders, but I'm not a fan of open source solutions.

Anyone out there have experience with designing/developing B2B sites using e-commerce solutions?