Don't use Network Solutions for anything.  In my opinion, they are sneaky folks that will force you to buy a domain from them should you ever make the mistake of searching the availability of a domain via their web site.

See these articles.

What happens - You search for a domain.  If it is available, Network Solutions registers the domain via something called domain tasting - thus preventing you from registering the domain with anyone other than Network Solutions.   This is really bad when a client comes to you wanting to register a domain, but the client originally searched for it via Network Solutions and thus inadvertently locked it down.  Oops! 

To me, this sucks donkey balls.

Thankfully, they are not the only game in town.  The market will punish these knuckleheads within an inch of their lives.