Hello From a newbie, which card for my DSi

Hi all, I hope this is in the right forum.
hope you guys can help me out.

I've got a DSi with firmware 1.3E and am after a card to backup all my games.

should i go for a R4i or a Acekard, i've read that there are fake cards out there which I obvisiouly want to avoid, is www.r4i.co.uk an ok site or can you recommend me one that is.

thanks a lot

I have 2 M3 Real Zero cards and so far there isn't a game that they haven't been able to play,I bought them from www.memorycards4u.co.uk and delivery was very fast and they do not sell any fake cartridges either!.The m3 zero is a good choice because the cartridge itself can be flashed to bypass any changes to the dsi from nintendo in the future.I have 2 dsi xls by the way for my wife and myself.