OBX is a cheaper company.. You can expect lower quality.. Will it get the job done? An IM is a pipe with four tubes on it.. It would be hard to fuck that up. I'm sure it would work fine.
BUT...
The real issue is why the hell are you replacing the IM in the first place? Hondas IMs are some of the best factory units in the world. There are no major gains to be had by replacing the IM....
Take that money and put it elsewhere.. Buy a Hondada system.. Buy some good headers.. Get a high flow cat, or upgrade your exhaust. Get a 5 angle valve job.. Unless you are pushing 400 HP or something, the IM isn't going to make much of a difference. You might gain a hp.. one hp for $250? Forget it.