If you use TD you should sign up for a Business to Business account.
Most things are cheaper, they will work with you on shipping costs and let you know when items will hit the sales list.
Call the b2b number on the site, my account manager is Curtis Gunn, I can vouch for him.
tigerdirect is good, I use both tigerdirect and newegg for years and no problems yet, I have a business account and personal account I check both so get the best price
i have used both never had a problem with either. although it seems like when i compare prices on the products themselves between tiger and newegg they are usually the same price.
but newegg likes to sprinkle in free shipping or very cheap shipping on a lot of items, so it seems like i normally come out a couple bucks cheaper when i order multiple items from newegg.
also you can not beat how quick newegg ships. ive never really compared them in depth but it also seems like newegg has a slightly more liberal return policy than tiger.