Well I have a MS-8 and was wondering if there are any good after market HU's to run it with. The basic features I'm looking for are CD, iPod control and 4v pre-outs (idk how important this is) or do you think I should just run the MS-8 with the stock unit. I drive a 09 Camry without the upgraded sound system. BTW I went and got the MS-8 because I'm planning on doing a 3 way front stage with raw drivers so I thought I could use all those pre-amp outputs and the simple setup.
Yes higher voltage is beneficial, specially if you are running long signal cables and the reason is that a high voltage signal will let you lower the input gain of the amplifier, so that more of the signal gets amplified and less of the noise.
Of course this becomes critical in setups where noise has shown to be a problem.