I have the BL Tiara and love it. I spent a lot of time researching, test-quilting, and thinking about what I wanted before spending this money. While I would love a long-arm on a frame, at this point in my life, I still work full-time and do not have the time it would take for me to become as proficient with that, as I am with my sit-down model. I also love free-motion quilting. So I decided to buy something I could enjoy right-away. I went with the Tiara since my local dealer is one I have experience with and trust.
And yes, be assured, you will have tension issues since these machines are quite different that home sewing machines. But with You Tube and various message boards, you can learn so much.