There are other things to consider. If you spell out your domain name over the phone, a not-so-techie person might not know what to do when you say 'hyphen' (as in spell it out or use "-").
Besides, since the word 'hyphen' is usually only used when you spell out the domain (it's not actually part of the company name) people will probably forget about it.
Imagine users telling each other in person. Then the person almost always will forget to add the "dash" when they type it in.
Id say keep coming up with names for go with the 4 syllables.
On my iphone I have to flip to another keyboard just to find the dash. It took me 2 seconds to find it. This is just another step a user has to take to get to our destination.
And I've been going to M-W.com for dictionary lookup for years until they got a better domain name.
Also, why not get both? Brand it with the hyphen name but have the other one redirect.