VWBobby 10+ year member
PG and SS nuthugger
Preamp voltage is somewhat important if you're running long RCAs from the front to the back of your install. If you have 12-foot+ RCA's, I would like something more than 2V pre-outs to prevent too much voltage drop. The more you have to turn up the gain on your amps, the more chance of noise being introduced, hence the higher pre-out voltage. A line driver accomplishes the same thing, as mentioned in the post above.
Kenwood and Pioneer both have the best options I've found for less than $600 in DVD. After that point, you can get into some of the more higher quality units with more features.
JVC has a lot of bang for the buck, along with Kenwood but be sure to look for a unit with a good EQ if you need one. A lot of them only have preset EQ's with "rock", "rap", etc instead of a real EQ.
Kenwood and Pioneer both have the best options I've found for less than $600 in DVD. After that point, you can get into some of the more higher quality units with more features.
JVC has a lot of bang for the buck, along with Kenwood but be sure to look for a unit with a good EQ if you need one. A lot of them only have preset EQ's with "rock", "rap", etc instead of a real EQ.