I have the Giant OCR3 and I have to say that it's a great bike. Although Sora components seem universally loathed around here, I have found no problems with them. They are quiet and shift smoothly. The first thing you'll want to do, is swap out the adjustable stem that comes with the bike with a proper fixed stem, and put on some clipless pedals. I don't know about the Orbea, but I recommend the Giant. I paid $650 for mine.