I'd look into an Audere preamp and whichever pickups you want. The Audere is MUCH quieter and a much wider eq range. I recently swapped a bad Bartolini 4.5 for an Audere Classic 4-band (you may prefer ones of their other preamps), and couldn't be happier. They're about the same price, but I like the Audere much better than I ever did the Bart.
Church Bassists Club #62, Extended Range Bass Club #137