Sony Ericsson K880i and Z810i concepts

The amount of Sony Ericsson concepts have dropped lately (probably due to the holidays) but thanks to razec from esato (who gave us the Z580 concept), we have two new concepts. Here is the K880 and Z810. The K880 is an upgrade of the K850 and the Z810 is probably the successor to the Z800. I find both of them nice but I like the K880 more.