Which Flashcart plays the latest Games?

I have the R4 SDHC with the latest firmware but it wont play some of the latest games like Iron Man 2 and some other ones....which flashcart is the best out there? one that will play all the friggin games.... Im tired of looking around...could someone please just tell me...much appreciated!!!

Please refer to my signature for a nice guide to the best flash carts. The bottommost spoiler should fit your needs.If you don't have signatures active: Here

try doesnt mean buy....avoid...self explanatory....so then which ones are the one we should buy?

That topic has opinions, facts, etc. on numerous cards, like he said, click the bottom most spoiler to get a "sum up" info