i need your help with the Fender jazz bass 5 string models made in japan. as far as i know there are two models, the standard and the deluxe. the standard is passive and with standard single coils. the deluxe has a preamp and humbucking pickups. i have never played one nad i'd like to know your opinion about the neck, fretwork and overall quality of these two basses. are there differences other than the electronics? how do these basses sound? i need one of them not only yo play, but because i have to test and A/B my homemade pickups for 5 strings basses in jazz format. so i need a 5 string jazz bass style. i'll put a j retro preamp in the bass i'll buy so the preamp quality of the deluxe is not an issue. thanks a lot!