HAM: easy SDR RX project for beginner?

After Smallwonder Labs SW40 this is my new challenge dream. I want to build this! :
http://yu1lm.qrpradio.com/DR2-2%20HF%20SDR%20RX-YU1LM.pdf
and here is the continuation of RockMite: http://qrpme.com/?p=product&id=RM4
I shall not forget ab. Miss Mosquita http://www.qrpproject.de/UK/missmosquita.htm
and Lidia http://www.sp5ddj.pl/Lidia%2040%20DC%20Receiver/Lidia%2040%20-%20DC%20Receiver.htm