Yh, Nalbandian is playing and Gonzalez, Monfils and Almagro.
I think Ferrer will be in Dubai.
Ferrer plays in Buenos-Aires then I guess he will be in Acapulco, not in Dubai. Yes he's "defending finalist" in Dubai, but he has more chance on clay in Acapulco, and he plays Davis Cup on clay next week.
The advantage of not being top-30 for Gasquet is not so much that he will not take part in MS1000 tournaments : actually he will be allowed to take part in Indian Wells and Miami, and if he improves his ranking a little bit, he might also take part in Monte-Carlo, Rome, Madrid and the others ... (not certain that he improves as he has many points to "defend" in the beginning of the year but he might do it ... and anyway he has a good chance to get a WC in Monte-Carlo).
The advantage of that ranking is that he can earn points in more than 2 ATP250 tournaments, rather than concentrate too much on ATP500 tournaments.
I don't think Gasquet has completely written off Davis Cup : it's just that he has no obligation to focus too much on that to make his schedule like in the past ... but if he plays well, he can surely play it again.