Looking for Lightnig commets

Kind of thinking about maybe getting a lightning and was looking for anyones or someone they know on there experince with them. I'll most likely be looking at 2000 and newer models with somewhere between 25-45k miles on them. How well does the supercharger hold up, when they get high miles do they get crapy the is the S/C a thing to worry about when the truck starts to get 70-80-90k miles is the motor still going to run good are things like rings, valves, timming chain going to cause a problem. Is the tranny good, how do they hold up, how much HP can the tranny hold and the rear end. Is a modded lightning still a good daily driver for a good coulple of years. I want to either mod one to atleast 425HP or find one and still be able to drive it every day with out worry. I wont be driving it hard every day but I want the power on demand.Basically I'm just looking for any kind of advive on can give me about them cause there not cheap but I really like them. Thanks in advance!! sorry this got kind of long.