Dscott makes a good point that we seem to miss a lot on these threads. The primary driver of changes to your setup should be comfort and efficiency\power and not neccessarily how you look to us via pics. Back pains can be attributed to too much reach and or too much drop and sometimes neck and shoulders to bars that are too narrow. If your back pain is due to too much drop then you will need to lessen it. Some people can ride 100 miles with 10 cm + cm of drop and others max out at under 5cm. If you want to obtain optimal fit then you need to figure out your optimal reach and max bar drop. Maybe if you just ride more you can get comfortable with this pretty aggressive setup, or maybe not. That bar drop is pretty much a function of head tube length and seat height that's why long legged riders need to pay close attention to head tube length when picking frames.