I have the MSD coils. No problem with them. MSD has been around a long time. They will take care of you should a problem arise. Yes stock could are the best. But they're expensive. Stock can be rebuilt with a $30 kit of just the boot and spring which are the wear items. But if you do have could that are really bad the MSD coils work.
2003 GT: JLT CAI, summit 75mm TB, C&L plenum, 24# injectors, Mac Prochamber, SLP LM1 cat back, 3.73 Gears, FR500 Diff, FR500 diff cover, Jmod trans and shift kit, Max Motorsports subframes, Koni oranges front and rear, DBA discs front and rear, shrader performance rear seat delete, APSX D2 wideband, MPT happy customer.