paddingtonbear

Hi,
I am new to this forum. I've made 2 quilts so far. This one was originally long arm quilted but I do my own quilting so I am a bit stumped on how to proceed with quilting this one. This is a throw rug size (1.25m x 1.8m)(49 inches x 71 inches).
The problem is that I was going to quilt straight across the quilt (the strips are 50mm wide). The bobbin thread with match the backing.
a) Should I use black top thread on the black and change the top thread when I get to the yellow/reds and back to black again for the other side (not cutting the bobbin thread when I change top threads). OR b) should I quilt across the black part then up the angle between the black and the colour and turn the quilt and quilt the other side of the black strip back to the edge again? And do the same with a yellow thread on the yellow/red part.

With a) I would have to thread in each of the little cut threads. There are 33 strips!! But the back would be neater.
With b) I am worried about turning the quilt all the time. I've read that you are supposed to quilt one way all the time to get the quilting even.

I thought about invisible thread (which I read about on here) but this is for DH and he will use it every might in winter and it will be regularly washed so I want it to last really well and not have thread ends poking into him.

I would really like some opinions on how to proceed. Thank you.