Wanted to go with BSW speakers but... Please help me design a system

[DocMike]

I want to go with a clean stealth Audiophile install. I cuently have the BSW sub, for stealth SQ sound, but am in the process of decidng what and how to upgrade the current system. I thought about going with the BSW stage one set up for speakers, but here is my problem. If I upgrade speakers with the BSW set, I will not be able to add an external amp and pocessor down the road without spending excess money on drivers I don't need. i assume there is no possible way to integrate the BW 2.5 divers placed in the rear doo and the front dash. I was looking at the alpine pxe h650, just released for factory integration. If I get this I would like to amplify all my speakers if possible off of one amplifier for a stealth easy install. I am really sick of multiple amp set ups, sorry.
So please look this over and feel free to offer alternative options or point out any flaws in my planning before I start dropping money on this stuff. I would like to maintain the 3-way system BMW/BSW have but it looks like it will not be possible.

Speaker upgrade:
Front: Can I go with a 6.5 inch speaker Like ( BOSTON ACOUSTICS PRO60 6.5)

6-1/2" copolymer cone woofer with neodymium magnet 1-1/2-inch voice coil

RadialVent cooling and TwinstageTM heat sink for increased power handling

Cast aluminum woofer basket

1" Type-M2 anodized alloy dome tweeter with slim AMDTM

VariMountTM adapter rings allow for fast installation

Axis-, flush-, and angle-mount tweeter mounting kit

External detachable crossover with bi-wire and bi-amp options

Power range: 2-125 watts RMS (250 watts peak power)

Fequency response 50-22,000 Hz

Sensitivity: 90 dB

Top-mount depth: 2-3/8"

Back: I really don't know what to do here as BSW has the ight idea of not putting tweeters in the rear to mess up imaging and I won't be sending much power here

Sub: BSW X108

Amplifier upgrade:JL Audio 500/5
Rated Power Front Channels: 100 W RMS x 2 @ 1.5 ohm-4 ohm (11V-14.5V) Rated Power Rear Channels: 25 W RMS x 2 @ 1.5 ohm-4 ohm (11V-14.5V) Rated Power Subwoofer Channel: 250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V) THD at Rated Power: <0.03% @ 4 ohm (front and rear ch.)
<0.05% @ 4 ohm (subwoofer ch.)
Factory integration:Alpine PXE-H650
Sound processor pxe h650 New * system integration sound processor for use when adding amps to a factory system * four sets of preamp outputs (front 1, front 2, rear, and subwoofer) * Imprint sound technology with a 512-band EQ and time correction * manually adjustable 3-band parametric EQ * high- and low-pass filters * included microphone allows custom sound shaping for your vehicle



OR should I just add the BSW system and call it a day. Those that have done aftermarket systems in the past, are you happy with your stage 1 set, up. I don't want loud spl, just clear sound.