[Fluffywings]

This is my first post as you can tell. I been reading these forums for the past week. I have the 2009 Fit LX so the Factory 4 Speaker Unit.

Due to money restraints, I have to upgrade in stages.

1) Upgrade fronts to Infinity Kappa 63.9i's. I prefer not to go components for simplicity. Keeping factory Head Unit as I don't want my vehicle to look like the stereo is upgraded.

2) Pick up Kicker CompVT 6.5" Subwoofers as replacement for rear speakers.

Now the part I am needing help is on the amplifier. I can't decide on one or even a few. I am looking at the following options:

a) 4 x 100w RMS @ 4 Ohm (100w for rear subwoofers and I assume 120w for front speakers since they are 2 ohm)

b) 1 x 300w RMS @ 2 ohm (150w/Sub) or 2 x 150w RMS @ 4 ohm (150w/Sub)
Power fronts off of HU.

Assuming Amp has High Level Speaker Inputs, but I am not against Speaker-RCA adapter. I am hoping to mount under driver seat but I am not set on it. I just don't want it interfering with my cargo/magic seats. By getting the speakers first, I will be able to tell if I can deal with the power from the HU.

Thanks for any advice and sorry for the long post.