If you need SMS/GPRS the following boards would be great,
http://imall.iteadstudio.com/development-platform/arduino/arduino-compatible-mainboard/im130514001.html
http://imall.iteadstudio.com/development-platform/arduino/arduino-compatible-mainboard/im120411004.html
Both also have the nrf24l01 adapter builtin for you MySensors network.