I would try on something in the middle (1.3 range) and the 1.53 again and see what you think. If this is final, don't settle, and get exactly what you want. You don't want to regret it later. If you are concerned you'll regret going so large, you don't want to get that to head some possibility off in the future of shrinkage. I wear a 1.15, my rings are sized to a 6 to fit my knuckles but my finger itself is about a 5.25 if that helps you gauge size. I feel like I could definitely go largerI don't wear my rings much though, so that helps with shrinkage a great deal!
Ame, your rings look great! Really sparkly and just... perfect!
If you don't mind me asking: how large would you go personally if you could get any diamond you wanted?