My suggestions
HU : pioneer DEH-3390UB (5k)
front component : JBL GTO-608C (5.5k)
rear co-axials : : JBL GTO948 (4.8k)
Had a similar combo in Alto and trust me it sounded sweet :-).
Don't compromise on HU and rear speaker if you want decent quality sound
Sent from my ZTE Blade using...