I'm about to buy a flash card and can't decide between these two. My problem is not about DSi compatibility, but build quality. I'm concerned about the build quality behind AK2. Many reviews have concluded that AK2i has improved build quality over AK2. Are the differences between these two big? How long does spring-loaded microSD holds up? And for those who shopped at Shoptemp recently for AK2, how is it? Is it bad in quality? In short, should I save or spend that extra $2?