Megan coilovers are a 480 front and 360 ft lb rear for the Neon SRT4. BC is 360 front and 240 ft lb rear. This means the Megans are going to be stiffer and ride rougher on the street but be even better on the track.
For most of our customers, we recommend going with the BC coilovers, and if you want in the future to change the spring rates, we can easily get replacement springs. We offer replacement springs that are plus or minus 60 ft lb spring rates. So, if you tried out the BC coilovers and you wanted a higher or lower rate on any corner we can get replacement springs if you contact us.