First flash card set

I've been doing a bit of research on the internet for a few weeks now, and was just looking for a more educated opinion. I'm looking to buy my first flash card set but have no idea which one to get.
Seeing as though at the moment I only have an SP it has to be compatible with the GBA. It also has to have a real time clock, and be able to save at any time. I'm pretty sure that's the basics.
At the moment I've been trying to find something at http://www.bamboogaming.com/ (I live in Australia so this is the easiest place for me, although international stores aren't out of the question). The one that I'm considering buying is the G6 Lite (4Gbits English Version). If anyone can help me out with this, like suggesting a better set, that'd be great.

dont get the G6 lite because its for the DS Lite.
i would suggest the M3 miniSD version because you only have an SP.