New to processers, which of these 3 do I need and whats the difference?

[Boomzilla]

Which do i need of these, and what is their purpose?(sorry for the noob question)

SOUNDSTREAM XBP-10 :

SPL Competition Signal Processor

• 2 Signal Paths – Sound Quality & Sound Pressure Level

• Individual Level Control for each Signal Path

• 5Volt or 10Volt Signal Voltage Switch

• 50Hz Tone Generator for Tuning

• Variable 25-85Hz Bass EQ

• Backed by one year manufacturer waranty

• Dash Remote with Boost Level, Subsonic Filter, and SQ-to-SPL

Signal Path Switch

• 4 Pairs of Outputs – 1 Main and 3 w/ Variable Delay for Time

Alignment of Subwoofers

• Through Pass Outputs

• Turn On/Off Delay to Eliminate Pops

SOUNDSTREAM INT-2BX :

Digital Equalizer with SUB woofer output

• 5 Channel Hi-Level Input

• 4v-30v Input Sensitivity

• Variable 30-80Hz Bass EQ

• Variable 0-12dB Bass Boost

• Variable Boost Q

• Subwoofer Input Selector

• Backed by one year manufacturer waranty

• 15-50Hz Subsonic Filter

• Remote subwoofer gain control

• Front, rear and Sub Low Level Outputs

• Delayed Remote Turn-on Output

• On-Board Clip Indicator

• Signal Sense Auto Turn-On

SOUNDSTREAM BX-20Z :

Digital Bass Reconstruction processor

• Max. Bass Control

• Dash Mount Remote Control

• PFM Subsonic Filter & bass level Control

• illuminated logo and knobs

• brushed Aluminum Case

• Chrome Logo Plate

• Bass Restoration Lighted Display

• Backed by one year manufacturer waranty

• Parametric Bass Control

• PFM Subsonic Filter

• Balanced Inputs

• Bass Output Control

• PWM High Head Room Power Supply

• Output Level: 13.5 volt

• Frequency Response: 10Hz 100KHz

• thD: 0.002%

• S/N Ratio: 132db

• Balanced Input Noise Rejection: 60 dB

Not sure if I need 1 or all 3, trying to keep 1 brand for as much as possible, I have all tower amps, 2xdtr1.3400D and 3xdtr4.680, soundstream hi's mids midbass, I've always just ran a basic 3way electronic crossover, but I want to do it right this time. Any advice or info is greatly appreciated.

[Boomzilla]

Anyone?