Quilting Dilemma

I'm about to start marking a quilt top that I've had ready for months - only now I'm torn between two different quilt designs. One is straight lines and will be very easy to do. The other is full of circles and will be much more time consuming. I want to do the circly one, but I'm not sure that it will look any better than the straight lines. Why put all that effort into the quilting if it's not for better results? But then, it might look much better than the straight lines. I need to just bite the bullet and make a decision!