You might want to add details so that people can help better.  It would help to know why you want the hen in the first place, whether or not you're adding a single hen to an existing flock or building your own little flock from scratch (single chickens are extremely stressed and do not do well so you'll need at least two for their own health), whether eggs, cuddly personality, or eye/yard candy is more of a priority, and even where you are considering getting these birds.
 
Commercially available sex-link hens are egg laying machines.  For about the first two years of their life.  Then their egg production drops off dramatically.  Because they were bred to be egg laying machines, they are also a lot more prone to reproductive diseases such as egg binding or egg yolk peritonitis which are extremely difficult to treat successfully and will lead to an early death.  If you are looking for lots of eggs and don't plan to make pets out of your chickens, a golden sex-link would be a good fit.  If you want chickens as pets in the same sense as a cat or dog and consider the eggs to merely be an added perk, then you probably want to find a different breed.
 
Wyandottes vary greatly depending on whether you get them from a hatchery or from non-hatchery stock from a breeder.  Hatchery birds are bred for high egg production.  My hatchery silver laced wyandotte lays about 5 large eggs a week.  I really can't complain about her production.  But, again, because they are bred for high egg production, they are prone to reproductive diseases.  A hatchery wyandotte will usually lay fabulously for the first 2-3, maybe 4 years and then egg production drops off sharply.  Non-hatchery stock tends to have fewer problems with things like egg binding and peritonitis and will lay consistently for years longer than hatchery birds, but do tend to lay fewer eggs per week than hatchery birds (during their peak years of production anyway).  They also tend to have consistently nicer lacing than hatchery birds (and most people therefor find them to be "prettier") and a more mellow temperament.  Hatchery wyandottes are infamous for being aggressive/mean to other chickens (most hatchery hens are perfectly sweet to their humans however).  My SLW hen from a hatchery is horrible with the other chickens, pulls feathers and pecks them for any tiny little infraction of the pecking order, but has always been very sweet and submissive to us.  Still, I consider her to be just plain mean and will not really miss her when she is gone (the eggs she lays, yes, the bird herself, not so much).