Update: I'm going to delay purchase. I made a trade and want to see how it goes. I traded my Kicker 07CRV12-2s and an amp for two Polk MM1240s. I might still end up buying something recommended here, but I'll see how these Polks do (they are a step up from the DXis I have laying around the house and have run in other vehicles).
The are not as conspicuous as you might think as I have a box cover made from speaker cover fabric:
It is hard to tell there is a box there when the hatch is closed unless you are looking for it:
I'm running them off a Kenwood amp that delivers 900 watts @ 2Ω
Specs:
Total Frequency Response22-200Hz
Nominal Impedance4 ohms
Efficiency92 dB
Power Handling
Continuous425 watts
Peak800 watts
Resonant Frequency30 Hz