best head unit:

Value: JVC SH909/Nak CD45Z
SQ: Clarion 9255(McIntosh)/Sony CDX-C90/Alpine F1/Denon

best amplifier:

Value: JBL BP series (subs only)
Value across product line: MTX
Single best amp on the market: SS DiVinci or McIntosh MC4000M
Very good brands: Brax, McIntosh, a/d/s/, PPI, Soundstream, Linear Power, DEI, xtant, etc....

best sub:

SPL: Digital Designs 9515/MTX RFL/CV Stroker (outdated but still among the best)/Eclipse TI, ID MAX

SQ: Adire Audio Brahma or Lambda PB series with the advantage going to the Lambda for costing 50 percent less.

Best combo/price/package/performance:

Adire Audio Shiva/Blueprint Drivers (all models)/Brahma/

JL Audio W7s need to be mentioned because they are very nice subs, but not the best at anything they do, and they are one of the most expensive subs on the market.

best full range speaker: Jordan JX92s

best component set: Seas Lotus/Rainbow Reference but some home made component sets with custom crossovers would be my choice.

best wiring: KnuKonceptz

best soundproofing: McMaster high temp mastic. There are better performers but not for the $$.

best LCD: I have little to no idea.