Sony also released 3 new cameras recently......namely A500, A550 and A850......look into those too.....it might interest you ....
And if you buy another better Sony...if a better camera is what you are looking for than......why go for a new camera so you have to buy all the new lens again....why not stay on Sony ....that way you are gonna save much money
This are the link to the reviews of A550 which seems a GREAT camera
Sony DSLR A550 Hands-on Preview: 1. Introduction: Digital Photography Review