First post here. I searched the forum and couldn't find the answer, so here's my question.

I have a 2012 A3 Sportback 2.0T, moon roof, no rails. I ordered a Thule cargo container on Amazon, and I understand I need to buy the roof rack separately. The Thule site is not very helpful. Their wizard suggest that I buy the Aeroblade 480R with an MSRP of $424, but it requires other accessories:

• Requires vehicle and Traverse Foot specific Fit Kit (sold separately).
• Secures to roof with Thule One KeyTM locks (available separately).

I find this very confusing. Google tells me that the Rhino Rack 2500 would work, and that's the only thing I'd need to buy. I can get it on Amazon for $270. Is that it? Anything else I should know? Any tips appreciated.