I'm a little overwhelmed by thread choices. Can someone tell me which thread I should buy? I have a Janome 4612TM if that makes a difference in recommendations. I have Joann's, Hobby Lobby, and Michaels near me as well as a very small local quilt shop...I have no idea what brands of thread she sells in her shop though.

And do I use the same brand/type of thread for both piecing and quilting?