You've listed a whole bunch of other reasons as to why your company is going great, inpite of the name. I'm presuming the name's not the most important thing? Sucks that money will be wasted on marketing and branding...but it's better surely, to change that then risk loosing more? It's not fair. It's shit. But it could be better to do now than 2 years down the line when the name is more recognisable. Give it a fight if you can but I assume but the most important thing is protecting the entire company, not a name :).