Beautiful quilt! You don't mention if you plan to hand quilt or machine quilt. If hand quilting I would echo stitch a lot of the patchwork 1/4" from each seam with an occasional "fancy" motif placed here and there and even a bit of fill work like a cross hatch grid in strategic places. My very first quilt was a sampler quilt and this is how I hand quilted it. Here is a link.
http://www.quiltingboard.com/picture...t-t107423.html This was also a very common way to quilt during the civil war era.
If you are machine quilting you can go in many different directions with this. You can do it like the hand quilting recommendation or an all over. Some era friendly all over designs would be a Baptist Fan or all over cross hatch in a 1" grid, either straight or on point. Tight quilting was common during the CW due to the batting usually being hand carded wool or cotton which required quilting spaced no less than 2" apart. Today's batting allows you to quilt more widely spaced.