Oh definetly get what you like the most.
For small normal systems under 1000w RMS a cap is unnecessary IMO. My buddy'* 91 firebird i installed a SONY ES (yeah, it is nice) that'* running 1000w @ 1ohm (never crashed either) and his headlights barely dim. If you're running multiple amps, or are SQ/setup competing you'll want a cap. My headlights only dim once the engine'* been warmed up for quite some time at idle, and i have a pretty damn beefy amp.
My deal with a cap is it'* actually pulling more power through the system, because it needs to fill up. They have their places, but if you're alt'* putting out it'* 14v constant while driving, you'll be fine.
I'd rather buy a nice set of components instead of a big cap....
'06 Vee Dub GTI 2 door Tornado Red
- 2.0 Turbocharged, Intercooled, Direct Injected, 6 Speed DSG, Underbody Aero, 17" Classix
- Moonroof, Bi-Xenon headlamps, Interlagos Plaid Sport Seats, 6 Disc In-dash, iPod integration, GTI Monster Mats (winter)
'93 Bonneville SE Purple Pearl H4U package - picked up June 23, 2003, Traded-in June 28, 2007...