I had the same question before and I ended up getting the hallman pro mbc. The reason was because I asked my tuner what else could I get to improve my performance significantly, and he specifically said to get the hallman pro mbc and no other. I asked him if I needed the rx version or the regular pro version, and he said it really didn't matter. I chose the blue color and I received it through UPS a few weeks ago and I was impressed by the quality. I could tell by just looking at it that it was hassle free. My tuner was right, especially if his car makes around 500 whp. Hallman Pro MBC!

 

the AEM unit isn't hard to use and its an all in one unit. I have no complaints with mine

 

I noticed when i had the hallman m.b.c it spiked to much and wouldn't hold boost to well as compared to the orginal buschur m.b.c controller and get no spike and hold's 22psi tapering by redline.The ebc tend to spool later and spike to much plus 600dollar's there crazy,also you only said adjust your controller twice a year once in the summer and the winter.