I am in need of some help selecting an amp/amps to power my system. Here is the list of equipment I plan to purchase and some of the amp choices I think I narrowed it down to.

Kenwood Excelon 679($300) since I want Sirius radio and the Kenwood Tuner can be had for free many places with the HU.

2 pair of MB QUART RKC 113 5.25" COAX SPEAKERs($70/pair on Ebay) for front and rear speakers.

JL Audio custom enclosure sub specifically for Ford Explorer. Just bought a used one on E-Bay. It's rated for 150W RMS @ 4 Ohms. I have been told that I want an amp with around 250W RMS @ 4 Ohms for this sub though as it is better too have more power than too little for this sub.

Amp. This is where it gets tough. Should I get a 5 channel amp like the
Phoenix Gold 9.0:5(50x4 & 150x1 @ 4 Ohms for $300) or
Kicker KX 700.5(40x4 & 200x1 @ 4 Ohms for $330) or
Hifonics ZX8000(50x4 & 200x1 @ 4 Ohms for $225) or

Or, should I separate the amps and get something like the
Hifonics BRUTUS BX1000D (250W x1 @ 4 Ohms $215) AND
HiFonics Zeus ZX6400 (85x4 @ 4 Ohms $200)

Thanks in advance for all your help!!!!