Q1 Earnings: Options for Balance of Year?

I've tallied my Q1 earnings and had a great quarter with 180k+ Skymiles, 330k+ HHonors, Hyatt Diamond Status, 123k+ Ultimate Rewards points, and some other great earnings. Full details are here:

http://notefromtheroad.com/2012/04/10/q1-pointmile-earnings/

I've had others suggest I should branch out from Delta for balance of year but don't know that there are great alternatives. AA is in bankruptcy and several who have switched, mostly from MegaDo incentives, seem to think the inflight experience is not as good as DL. United/Continental is struggling with merger and seems like many think new program picks up many bad attributes of old ones. US Air was a disaster for me when I tried them 3 or 4 years ago.

My Delta in-flight experience has been great this year. Any Delta loyalists who have switched that can endorse new direction?