I anticipate having around $2000 in the next month or two to spend on a 6 string bass. If I am unable to find a used Ken Smith or MTD for that price, I plan on getting a Carvin Icon 6 made, and having my local repair shop install an Aguilar OBP-1 preamp and Bartolini quad coil pickups in it. Or I will get a Bolt on Stambaugh with the pickups and preamp already installed for about the same price. My question is; are there significant differences in sustain and attack/punch between neck-through and bolt on basses? I have always played and liked the attack and snap of bolt-ons in the past (I couldn't afford neck-throughs anyway), but I have been playing theatre productions recently and have needed better sustain than what my current bolt-ons have. What do you guys think, should I sacrifice the neck-through feature in order to go for a custom?