For IT techies, who is your wholesaler

I’m doing some research for a company that is expanding to include computers, computer parts, components, etc. for both desktops and laptops. I’ve heard good and bad reviews.
In your experience, who is the best wholesaler to look into for a well established corporation?
Bear in mind that this is the beginning of this “entity” within the company so I don’t assume sales will be incredible for awhile.

Thoughts? Debates?

Moderator’s Note: This thread seems more of a poll than a debate, so off to IMHO it goes.