You may also want to see what your local store is willing to do for you. I paid a little more at the store for mine but I got a few free rounds of Paintball at their park. 10 dollars off a case of paint and 5 free air fills. The will also fix and upgrade my gun labor free for life.
This is where I just ordered my Impy. Just ordered today so it obviously hasn't come yet. So I don't know about customer service (I'll report back) but price wise it's great. $425.00 for an Impy with a Mag-Blade Trigger and a tapeworm (A lpr that cures fsdo). I don't know about that epaintballoutlet because the link doesn't work, but I think this is a great deal. The tapeworm is like 10.00 and the blade trigger is probably 15-20 or something. Take that off and it's 400 for the gun. And there's no shipping and handling (for me at least) because the store is in Mass and I'm in VT.
my shop sells slightly used vert reg black impulses for $300, and they usually will put a magnetic blade trigger on for like 10 more dollars, not to mention they give you discounts if they have to fix anything on it