@joerg_rw

Do you think that the pcb layout could be designed with a little space dedicated to optionally solder an rtl2832 and an e4000?

Usually, this would require a very little space and would allow to have onboard a dvb-t tuner and an sdr receiver.

Look here for an example of pcb with these ic:
http://www.radioelementi.it/public/dtb_sdr.jpg


Eventual rtl2832-gr IC availability:
http://www.oemstrade.com/search/RTL2832-GR/