ASI is a horrible distributor, most of the prices they offer I can get better prices of newegg and almost all online retailers. I have pointed this out to them and they still don't change my prices. Needless to say I have never bought from them. I say this about the southeast division of ASI, the west coast one may be better though, I don't know.
Ma Labs is another crap distributor, they make you pay first before shipping, which is not unusuall BUT they make you mail a check first, unlike good ones that will take credit cards for instant payment. They failed to tell or show this so when I went to place an order there they tell me this then and I lost sales. Well, I was ****ed to so say the least!
If you want a good reliable distributor check out dandh.com. The prices there are reasonable and they give good quantity discounts even when only buying 10 of an item, not to mention they have divisions all over, so I get my orders the next day even with using ground.
I would say try and get your products directly from the manufacturer, it takes a little more doing but is well worth it, I save up to 10.00 on power supplies alone from one company by going directly to a manufacturer. Some will do it some won't but always check. Also try AMAX, they seem to be good and reliable but the packing leaves a little to be desired. I use them for modding items, like Lian Li and Abit.
Well there is some of my info I know on distributors at the moment. I know it seems like alot but I figure it will save you the headaches that I had when starting out, and believe me they will come.