Friction shifters are the most reliable way to change gears, bar none, and these are the most advanced there's ever been. Dia-Compe use an evolution of SunTour's (minute of silence...) Power Ratchet system for nearly effortless shifts.
Finding a high-flange freewheel hub that is both high quality and affordable isn't easy to do these days, and it's even harder to find one in 126mm spacing for older frames.
SILCA has partnered with Vittoria to create the highest quality, lowest rolling resistance, finest riding inner tube, sized for modern clincher tire setups.