Hi LeslieD,
I heard all the Shen basses at NAMM. My honest impression from what I heard (and I heard them all in a quiet hall, before they opened the doors each day...and I DID visit them each day!!

) was that all of the flat back basses were louder for pizz. Although the Rogeri round back willow bass is a wonderful bass, I thought it might have been a smidge too dark sounding for my taste. I think the darker sounding willow helps the bass sound "older" right from the start, especially when they have a round back.
I do LOVE the Rogeri shape though. Such a classic shape, and I would buy a flatback Rogeri bass made with soild carved maple in a heartbeat. My last bass was a Shen Willow 3/4 (SB 200), which I played regularly for almost a year. It really opened up the last few months I had it This bass, with the maple back and larger shoulders, is substantially louder, even as a new bass. Truthfully, the 190 sounds like it has a solid maple back...it would be interesting to hear a solid and a ply maple back Rogeri side by side. I wonder if it would be much of a difference. However, the 190 sounds so good, even as a new bass, it's amazing that Shen can do this! My bass was VERY well set up from Jeff Sahs in San Francisco. He did an amazing job planing the board for a very even growl throughout the bass, and that particular setup has really helped this bass shine.
Now, I'm not a Ken Smith, so my budget doesn't allow me to own a 50K bass, but for what I do, which is play jazz 4-5 nights a week in clubs and restaurants, this bass works wonderfully for me. I have owned a few 100 plus year old basses, and an old Pollman, so I am not unaware of what an old bass can sound like. But, this new bass is a nice blend of bright and warm, loud and sexy with that Rogeri shape. Plus, if something ever happened to it, I wouldn't be suicidal!

For around 3K, how can any of this be a bad thing?