the whine you hear is some kind of engine noise .....as you surely know. The problem is they are a ***** to get rid of sometimes. I can recommend this. First, make sure the power wire isn't running down the same side of the car as the rca (signal) wires. Try moving the amp ground to another location. Where is it grounded now? I may have more options.
It is possible to run a good deal more power than it can "handle" the only thing is be sure your have a good output "voltage" over the rca's. Nowadays it seems 7 amps of preamp voltage is almost avg. Some of the less expensive decks have 1 or 2 volts (which can cause noise!!). 4 to 8 is the norm and is good.
As far as your speaker question, when you get into good woofers (both you listed are), they are all very similar and I don't care what anyone says they probably can't hear a difference between two woofer brands. They may be able to hear a difference between what the enclosures make a woofer do but not what the speaker is doing. I must say though Infinity is usually a better sq speaker. While kicker is a great all around speaker. I placed second and third in a usac sq competition with kicker so I know they are capable of good sq .....the RTA meter doesn't lie.
96 honda passport
eclipse head (55040)<br />jl audio 500/5<br />Infinity kappa separates up front<br />4 eclipse 10"<br />audio control esp2 center stage processor
soon to come: Eclipse mids and highs upgrade<br />e-comm module<br />nav system