I was like no brainer MP3 till I thought a little...and looked at my rear (?!~?) without the backrest...a large rack might be too much visually. Every comment I've seen on the search was basically a "bigger is better" type observation when comparing the OEM rack and the MP#. . At least one guy though, wants to trade his mp3 for an oem. Since size isn't my prime consideration, I'm wondering anyone who has and is satisfied with the oem, or has the MP3 and wants to chime in or has neither and just wants to bloviate!!I'm open to all thoughts. For me riding is still a blend of best function and best looking...and I'll sacrifice some function for better appearance. (Even with that "sacrifice" this bike is everything I could want.)