I definitely prefer VV's damper felts, and have experience with both. The Avion kit has extras, yes, but it's unlikely you have any need to replace bridle straps, for example. I agree with Alan - determine what would actually benefit from being replaced. e.g. Check: are the grommets pancaked and squashed, or crumbling? Are the damper felts floppy and falling off? Are the hammer tips badly beat up? (minor grooves don't count - new hammer tips begin to develop grooves almost immediately.) The attention you pay to optimizing the escapement and then the strikeline are the biggest variables by far, much more than replacing any parts.
David
David