highly recommend a CB750 i have build about 9 now... fantastic bike, easy to source parts, and pretty fast for a vintage ride... another unsung hero of the vintage world is the yamaha maxim 750, it is a shaft dive inline 4... really quick, cool mags, and makes a great platform to build a cafe off. let me know if you have any questions when you get rolling... my wife just sold her CB550 cafe, her bobber, and GSXR600 when our baby was born... she is all over me to build her a new bike... i am hoping she will just take to the quads... if not i will be building a hot rod sporty bobber for her, buell heads and NOS i am sure she will have as a requirement hahaha