kauai_gal: You might have read the thread I've authored. I own an Aurora. It flexes a little more than my 520, therefore I feel it is slower. If running top speed isn't an issue, it's a great bike. The Aurora is comfortable over long distances and fun. A stiffer frame allows for better power transfer to the rear wheel, but makes a rougher ride, but I like that in my 520. It's all personal preference. By no means am I saying the Aurora isn't a good bike. It is a good, comfortable ride that is lightweight steel - soaks up vibrations - and does what it was built to do. I'm going to eventually trade/sell it at my LBS, not because it isn't a great bike - but because I prefer the geometry, fit, and feel of my other bike. So don't count the Aurora out. This year the Aurora comes in blue (standard) or maroon (elite - with annoying disc brakes - ie. more of a hassle, imo.)