Hi,
Interm the quality,performance & safety I will go to Alpine HU.. if the price tag not your consent.. I think 7998R much suiteable for you rather than 9853..price also not much diff...Year product 7998R(2003) japan spec, 9853(2005) china spec... feature..7998R better than 9853... some Mid class high end HU is 7998R, HX-D1, HX-D2, Naka CD700/700II, P9, Eclipse 8051/8061.. I tot someone selling new 7998R just around RM2150 (1yr warranty WKH) in sale forum...Hopefully u can audit the HU from others user but carefully to chose with car to audit..coz some maybe using additional stuff.. try find HU + Comp (without amp) to audit or go to reputed shop to audit it...like KF Audio, SoundQuest, Tenichi, ACP, KK Lau..normally this shop have demo set-up for us to audit...U must understand that we/forumer can not give U 100% what U actually need coz we are Human...only hair just same ..black colour ...haaa haaa haa