Obviously the cow must not suck if a lot of people say otherwise.
Cow is awesome, well modeled, only thing is that it doesn't fit the space theme... but isn't it a cliche for cows to get abducted by aliens? Let's just say this cow was abducted and is taking revenge - there's your spaciness for you.
Oh, and I'm not saying the B-fighter isn't good or anything, just sticking up for the awesome cow.
Also, good luck on the map. Hope it doesn't suck ass.