Configuration Help

Hi,

I will purchase the arduino board and some componentes, but i need some help choosing the correct configuration.

In my project, I need the arduido board connects to the Internet by lan to receive and send some values, and send the information to the Serial port , that is connected to an gsm modem.

What I need to this project ?

1x Arduino Ethernet w/o PoE module 1x GSM Modem with Serial Port

or

1x Arduino Uno Rev3 1x Arduino Ethernet Shield Rev3 WITHOUT PoE Module 1x GSM Modem with Serial Port

To send data to serial port, i need an adapter or not?

Thanks for the help.

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