Avoid Osaka at all costs. I ordered a blacktop S13 SR20DET clip from them (I'm into Nissan's now) but through another company (their supplier was Osaka, motor was shipped directly from Osaka in Canada). I recieved a redtop clip with 156k km (roughly 96k miles) and a massive front oil leak on the engine and no computer. I had to pull the engine, ship it back (after almost a month of waiting for an answer) and they were supposed to send me my blacktop, I recieved another redtop (again, a month after they recieved mine) and still never got a computer. I wouldn't recommend them to my worst enemy, avoid them at all costs.

Hmotors seems to be a legitamate company and I haven't heard of many problems, and those I have heard of (missing something, broken something ...) were resolved quickly.