Would like help here. I have an '02 pathfinder and need to purchase a bike rike for my new giant comfort bike. I do not want roof top. I purchased an inexpensive rack ( schwinn -target) for 39$ and it doesn't seem very secure. Is there really a difference in quality based on price? I searched the internet and it seems like I can get a thule rack with 2 add'l straps ( 6 vs 4) for 30$ more. Does it really make a difference. I bought a good bike , guess I shouldn't skimp on the carrier....thoughts?