I just received a prequal offer in the mail for the Cap One GM Buy power card. I'm pretty stoked about that because its the first card offer I have gotten since working on rebuilding that wasn't subprime.
My concern is that yesterday I had a 19 point drop in Exp score (just Exp). I have until February to accept the offer, but of course my fingers are itchy to app for this card.
Advice? Should I wait? Should I pull the trigger and hope my other 2 scores are high enough?
Such decisions! 
Are you planning on buying a GM in the future? While its nice to get offers, especially while rebuilding, dont just jump on a card because its being offered. Thats how we get stuck with a card we either dont need or one we regret. Ive read some post here that shows this card doesnt grow well for many though i do recall one poster getting it over 10k. Luck on your decision
We are actually planning on buying either a Yukon or Suburban this spring, but I doubt I can rack up enough points that quickly. Eventually I would like a Silverado, but that will definitely need to wait a couple of years after the SUV purchase.
Not even going to lie, I am probably more excited at the prequal for a card that doesn't come with a $75 initial fee and $300 CL 
I understand that feeling headsup. When i got my very first mailer, for Discover , i was elated . However that just kicked off my 4 or 5 hard pull adventure of denials til i finally gave in. If i could redo that little adventure i would definitely have showed more restraint over my euphoric emotions of having a mailer. Good to see that you are asking questions first, patience is hard to practice sometimes but when done right can lead to great things