Magical, Musical, Mini Monitors

As I will soon be finally back in the States, I will be shopping for a car with a steering wheel on the left hand side. A company called Milbert makes an audiophile tube amp for the car and someone suggested to me that home speakers work better with the amp than any car speaker they have ever heard. As I am not married and have no children, my taste runs more towards Ferraris than minivans, so I was hoping some of you might suggest the tiniest monitor with warm, musical midrange that I might try out with this tube amp. Thank you very much.