Hi guys, I'm looking to build a budget sound system.

Out of these 3 subs which one do you guys recommend? Reason I chose the slim type cus I want boot space. And I'm thinking of putting the sub under the front seat (Has anyone done it before, is it good or bad?)

Thanks guys

1. PIONEER 12" 1200 WATT SUB IN BOX $138
http://www.jbhifi.com.au/car-sound-g...box-sku-99303/

2. CADENCE 10" 400 WATT SUB IN SLIM BOX $158
http://www.jbhifi.com.au/car-sound-g...box-sku-52474/

3. AUDIOLINE 12" 600 WATT SUB $147
http://www.jbhifi.com.au/car-sound-g...sub-sku-73179/