by garbo41610 » Tue Jan 11, 2011 7:05 am 
			
			they say its best to place it right at the tailgate
That's not necessarily true in all applications. I found in my old Mazda 323 Astina hatchback that the subs sounded better firing straight up.
I have also found in some applications the subs sound better firing into the rear seats, firing towards each other with one sub on either side of the boot angled towards the main doom light in the cabin and also firing towards the tailgate. I'd suggest playing around with the subs locations and the direction they point to find the best position for them. However, you also have to take into account the functionality side of things as well haha. 
Taking all into account then yes, pointing them at the tailgate is probably the way to go, but, there are other options.
a single 10" with 1000watts @ 2ohms
That will definitely be fine in a wagon especially with FHRX doing the tuning.
 
			Car(s): Steel Silver MY10 GT Wagon + 1985 Subaru Sherpa
Mods: (GT) HKS Panel Filter. The HKS I put in the MY10 is the same filter I took out of my MY05 GT. So yes, they do fit. Custom leather heel pad to minimise carpet wear in the drivers footwell. Slotted front rotors. (Sherpa) 14'' 6 Spoke mags, Chrome Gear Shift (sick!), Alloy Pedals (sicker!), new positive and negative battery terminals, Alpine cda-9827 H/U, JBL GT 6x9's boxed and mounted (sickest!), Kicker DS650.2 component speakers mounted in the footwells in flibreglass pods, Alpine MRP-F200 4 channel amp (4x40wRMS), Rebadged with hektik chrome eBay badges, STi stickers for more powaaaa, "leather" handbrake boot, recarpetted with grey/black car carpet from Bunnings, sick Clarke Rubber boot mat, polished and waxed.