Antenna for RFM69HW

Hi, I've seen a couple different types of antennas. I was wondering if anyone has a feel for the relative advantages of each. Can I really just solder a 4" wire to the antenna pin? Also, what kind of orientation should the wire be at relative to the orientation of the receiving module's antenna?

Here's a picture of one using just wire and one using an actual SMA antenna.

http://jeelabs.net/attachments/download/1534/Hope%20RFM69HW%20modules.jpg

Thanks!

I had a big fail with the wire method! The range of the module was much less than I expected - perhaps I did something wrong or my soldering skills weren't up to it.

In the end I gave up and instead bought some of these modules http://modtronicsaustralia.com/shop/rfm69hw-breakout-board-with-module/ and SMA stub antennas, it's working very well for me so far.