Subwoofer good to go?

[IDV8]

Any thoughts on this setup?

Headunit: Pioneer DEH-2350UB (Installed already) http://www.ryda.com.au/Pioneer-DEH-2.../deh2350ub.htm
Amp: Pioneer GM-3500T 2 Channel Car Amplifier $118 http://www.ryda.com.au/Pioneer-GM-35...-p/gm3500t.htm
Sub: Pioneer TS-W309S4 12" Subwoofer $152 http://www.ryda.com.au/Pioneer-TS-W3...p/tsw309s4.htm

Am I going to notice any cons with the setup above? As for wiring I'm unsure so I think my best bet is to have the car re-wired with the new wires that come with the amp. Guessing I'll have to mark the current wiring so they don't say they've swapped it over when really they haven't though.. lol :P Any specific reason for Alpine sub > Pioneer sub? I'm hoping to get the best "bang for buck" out of the system purely for better quality audio when I drive.