System for my 71 Blazer

[Magnuman]

I just bought a 1971 Blazer that I am finishing up.
I brought it to a car audio place and asked what their recommendation for a system.
Here is what they recommended:
Head Unit - Pioneer DEHP6900UB
Amp - Audison LRX5.1K
Front Speakers - Hertz MLK165
Rear Speakers- Hertz HCX165
Subs- 2-10" Image Dynamics IDQ10
Audio Line Driver - Audio Control Matrix
Pre-Amp Level Controller - Peripheral PRC1

I know that this would be an incredible system, but I don't want to spend close to $4,000 on the components.

I have read reviews on the Pioneer head unit and I want to stay with it.

Can anyone propose another less expensive direction and still get decent sound quality in the Blazer?
I am willing to spend $1500 -2,000 on the components.
I also have a set of new JL Audio TR525-CX (5.25") speakers that I never used in my boat.

Any help appreciated.