Recently I have been looking for some new shows to watch and I have found a few that I'm not sure about, so I thought you guys could help me out.

Are any of these shows, in your opinion, a MUST see (or atleast up there with the great ones) and why? Or, should I avoid one?

Outlaw Star
Monster
.Hack//SIGN
Hunter x Hunter

I realize Hunter x Hunter and Monster are very popular but with my limited space I am wondering if I "have to" download them.

Thanks in advance,
xDM