I really like that Cerwin Vega B55 bomber, solid amplifier for the size. Personal choice - 5 channel amplifier or 4 channel amplifier with a self-powered sub (two sets of power/grounds)
In order to get those 5.25" in the front pods, you need either the Metra speaker brackets or the Select Increment Pods. $10 vs $80 - the pods add a lot of value to the install.
I also used a dynomat equivalent on the SI Pods - looked like this:
View attachment 193559
I would no doubt get that BLAM 4 channel amp over the Soundstream. BLAM three-pack