I know there are a lot of these posts already out there, but I wanted to add my own wishlist of 'requirements'! I have a black DS Lite, and an R4 for my DS ROMS. (Which, by the way, I love!) Now I am looking for a slot-2 device to play GBA ROMs. Needs to have the following: -High GBA ROM compatibility -Match the DS Lite dust cover -Be compatible with the 'Boot Slot-2' feature on the R4 menu -Expandable memory (micro SD) -Oh, yeah, and as inexpensive as possible The one that I am mostly leaning toward is the M3 Lite. (Yes, I know it is also the most expensive, too - but I figure what is an extra $30 a year from now if I am still really satisfied with it.) Can I have both the R4 and M3 Lite both plugged into the DS without having to remove either of them to be able to play ROMs stored on either card? (Boot the M3 Lite from the R4 menu? or vice versa?) Where is the best (price, speed, reliability) website to buy these cards? I got my R4 from foundmy.com, but they don't sell M3 Lites if that is the way I am going... Recommendations?