Hey I hv a 2010 g37x sedan currently lowered on lowering springs/factory struts. The ride is crappy n im trying to improve it to as close to factory as possible. I was looking at D2 or Bc racing coils. Any suggestions/recommendations as to which one is better. Just going to be used as a daily driver no racing or hard running. Plz advise

 

I think the majority here will recommend BC.
You should go into the sedan and suspension sections of this forum though - plenty of useful info to dig through.

 

Welcome to the site!
Unfortunately there aren't any AWD coilovers w/ spring rates that are close to OEM, once you have the coilovers adjusted the ride is going to be firm. KSport, BC, D2 would be options at the $850 price point, and Stance & Fortune500 in the $1200 range.