[SIZE=2]I'm planning to upgrade my sound setup from SQ to SPL. I only have a 20K budget. And here is my current basic setup:[/SIZE]

[SIZE=2]Kenwood HU[/SIZE]
[SIZE=2]Targa front seps (driven by the HU)[/SIZE]
[SIZE=2]Kenwood KAC929 amp (for the sub)[/SIZE]
[SIZE=2]JL Audio W3 12" sub[/SIZE]

[SIZE=2]I'm planning to get the Crunch PZi 175.4 4-channel amp to power my targa and sub. Then I'll get some bnew rearfills as well.[/SIZE]
[SIZE=2]I'm also eyeing on the JBL GTO75.4 amp or the Hifonics TXi 6406. Which among theses 3 amps is better?[/SIZE]
[SIZE=2]I'm confused if I should dispose my Kenwood KAC929 amp or continue using it for the sub.[/SIZE]

[SIZE=2]I'll also get a brand new 12" sub (bebenta ko na kasi ung JL sub sa friend ko) that matches any of the 3 amps I'm planning to get. Any suggestions on which sub to get?[/SIZE]
[SIZE=2]Lastly, do I need better rearfills or can I just use the stock and let it be powered by the HU? What is the best way to go here?[/SIZE]

[SIZE=2]To summarrize, here are my options:[/SIZE]
[SIZE=2]A. Get a new 4-ch amp to power my targa front seps, get a new 12" sub, use my stock rears powered by the HU, and dispose the KAC929 amp (1 amp system)[/SIZE]
[SIZE=2]B. Get a new 4-ch amp to power my targa front and stock rear seps, get a new 12" sub and continue using the KAC929 amp (2 amp system)[/SIZE]

[SIZE=2]Tama po ba to (feeling ko may mali)? Hehehehe! What should I prioritize? To be honest I'm still new to this kind of stuff. I just wanna make sure when I'm gonna the right equipment at maganda ung tunog and satisfied ako sa SPL ng system.[/SIZE]