dude, darkaura, what are you talking about? R4's right up there with cyclo and dstt.
my reccomendations (top to bottom, best to worst):
-R4/Cyclo (R4 is cheaper, Cyclo has more features)
-M3/SCDS1/DSTT
-edge (only down here because my friends got them and they all got defects)
-acekard (god i hate this card)
-Ds fire card, N-card/clones, other crappy cards no one cares about
Although R4/M3 is a good card, it has no extra features, there are cheaper alternatives that are just as good, no SDHC support, and outdated. It's solely made for playing games, and nothing else. Everything else can do what R4 does, and in fact, does even more. It's still a good choice, but it's harder to find, since Nintendo is busting down R4 factories in China, and some other places in the world.
Also, Acekard RPG isn't THAT bad. It's open sourced, Dual memory, and some other stuff that makes it a good choice for some people. Unless you're talking about the original Acekard....
My recommendation
Cyclo> SCDS1 SDHC> Acekard RPG> EDGE> DSTT > R4/M3 > M3Real> N-cards and clones> DS-X.
Cyclo: Easily the best
SCDS1 SDHC: It has RTS, RTG, and other features that make it a good choice. It's actually cheaper than a R4 in most places, since it's only $35 at DX. Just doesn't have the Slow-mo, and has some minor issues, but still one of the best.
Acekard R.P.G: It's not bad, in fact, lots of people are using this card. You can't just put a card at the bottom, just because YOU don't like it. It has some interesting features, and uses dual memory. It's a good card, and it seems to be built very tough.
DSTT, EDGE: Now. I know some people prefer DSTT over EDGE, since EDGE is a Cyclo clone, but it's not that bad. Although I haven't used it, from the review, it looks very good for the price. Even Urza liked it, and says EDGE is better than DSTT. Faster, and more responsive menu than the DSTT, and everything is actually organized. If the EDGE team fixes some of the functions, like the skinning functions, it'll be even greater.
R4/M3: It used to be legendary, but it's just not really the best of the best or anything anymore. All the stuff were already explained before, and there's no point of saying it again.
M3 REAL- I'm actually very disappointed in the card. It's very slow loading time, has quite a few problems,
and seems to be very thin, thus can break easily. The Gba expansion and the ram seems to be made from poor material, and some people said that it collapsed after they took out a screw on the back.
Another problem is that, there were about 2-4 people who bricked their DSs' due to the M3 Real. The chance of this happening is very low, but still, keep that in mind. I'm sure the G6/M3 team will fix it, just like how they did with their other products, but it can take a long time fix all this.
The rest is not even worth mentioning.