A very nice review of the new SIRIUS Sportster4 was written in Canada's The StarPhoenix. One thing I like about it is how they keep the review short and sweet, but pack some powerful comments. They grab your attention pretty quickly with the opening sentence:

If you subscribe to Sirius satellite radio and listen only to Howard Stern, then ignore this product and buy the cheapest receiver available.

Funny. 

JJI Electronics has the Sportster 4 in stock and on-sale for $139.99.