Use a hyphen to get a .com or go with .net?

I am torn between x123keyword.net or x123-keyword.com. Will either have any effect on the domain's SEO potency? The x123 has nothing to do with the keyword, rather something like a company name. And this is in a fairly professional niche (think doctors, lawyers) where a .com domain may help with a customer's perception of the company... But I do not want to be penalized for using a hyphen.

What do you all think?

I would have gone with the .net. It's my personal opinion btw.

Yes even i suggest .net will be the great thing
cheers

Since it is a fairly professional domain do not go with a hyphen as it is associated with spam duplicates etc.

A .net domain would be most appropriate.


Hope this helps. Cheers.