Wheels also can make a significant difference in climbing. The Amira is supposed to have the advantage over the Ruby for climbing but when I tried to compare these two on some 14% incline hill repeats, I couldn't feel a substantial difference. I ended up getting a Ruby but I did have my lbs build some sweet wheels shortly after riding around with the wheelset it came with (which felt heavy), and I feel my new wheels have made a real difference in climbing for me. My climbing ability is markedly better with my new wheels.

As for the bike with digital shifting, you can get the same bike without it, can't you?