In goose calls especially, the advantages to acrylic are what you already mentioned in durability. Also, the acrylic call tuned identical to the poly or wood call with the same guts/setup will have the acrylic call being "sharper" sounding. Most sounds will be more crisp on acrylic, whereas wood and polycarb calls tend to be a bit more muffled or some may even say "natural" sounding. FWIW, all three materials have there place both in the field, and while I don't have any experience with the other-on the stage too. A lot of guys, myself included grab certain calls on certain days or for certain locations (e.g. some people use wood calls over water-thinking more natural "content" sounds help draw birds better). Windless days or ones where too much volume may be unnatural also leave some guys grabbing for their poly or wood calls. Acrylic is still the choice for many hunters day in and day out though since their versatility and range is pretty hard to beat. The bottom line is this, finding a call that is comfortable to hold and use and learning how to tune said call will be the biggest factor in your success. Lastly, putting in the time practicing how to use it both in the field and if you aspire to it, on the stage too will all help. Many contests (even the Worlds in Easton, Maryland) have been won on polycarb calls (maybe wood ones too???) reiterating the fact that it is indeed the "indian and not the arrow". Good luck with whatever you decide on.