Is there anyother major difference besides the amount of inputs?

I was looking into the 800 because well it is talking about all over here, several people pointed me in its direction and it is one of the top audio interfaces out there.

Now they have a 400. which is cheaper but seems just as worthy.

My MOTU 8pre died after a couple of years, with absolutely no help from MOTU. The customer support is non-existent. Months of trying to call, email, technical support online, etc. I'm done with them.

I'm looking at the RME Fireface 400. Opinions on this one?

Other suggestions?

I use it for my keyboards, guitars, and vocals with Cubase SX3.