K3 and CR/IR cases in process

[Scott'n'Natalie 0]

Quick question which I haven't been able to find an answer to.

The hubby (the petitioner) got the NOA2 on both I-129F and I-130 cases on the same date. Both indicated what was being sent to me.. the first being a package for me to work on and get moving for the interview, the other is a form to declare an agent in the US to speed things up due to snail-mail delays and such.

I've received the package for the K3 last night. I've started gathering all I need (renewing passports, booking the medical.. ) but here's the question...if we want to stick with the I-130 as it seems to be going just as fast, when do we back out from the K3?

I might be wrong in assuming both are going just as fast based on the notices of action but I'm not entirely sure. Am I getting ahead myself by getting all that's noted in the K3 package so that I'm ready when I get the other? Should I continue with both till I get to the point of an interview date? Though we'd love me to move ASAP, it would be nice not to have to wait for me to be able to work which seems to indicate that the K3 would slow that down a little.

Thanks for all the responses.