I am going to be depositing 50k plus into a td ameritrade account and there is an offer for 25 000 miles on the big 5.

I am out of New York and prefer JFK as it has the airtrain. I have an amex platinum so I get the into the lounges and really like that. I work a lot on the computer so I arrive 2-3 hours early and have no problem with a similar layover if there is a lounge.

I have been earning miles on delta and a little on american. Prefer delta for the free drinks. Visit PCB on a annual basis. But maybe achieving lifetime over many years would be a good idea. DO other airlines match that on a year to year basis?

I like Continental as it has free drinks and good flights into mexico and a lounge in las vegas. Downside is Newark is the hub.

United and US airways do not interest me.

The main question is where is it best to get 25 000 miles?