I should clarify that a bit better. First, that's only taking into consideration the IEM's I've heard or owned. Two, this is for my personal preference and requirements for an IEM in this price range. Since I have 1Plus2's anything in the under $500 price range is going to be for portable/back up purposes so what I'm looking for might differ than someone whose budget tops out in that range. For instance, I'm more concerned with overall balance and tonality than ultimate resolution or soundstage size. So with that in mind I'd say there's certainly going to be IEM's that are better in some aspects than the MA750i's but, from memory at least, out of all the IEM's I've heard under $500, the MA750i's offer the best overall package for my preferences.
Lol, I meant it in a good way. I myself compared it to UE 900 in my impressions. Hey, I've got a 1 Plus 2 here as well, wanna do a comparo? Kidding, that would be so unfair.