And hot #$#@, Springfield now - or soon will - have an XD chambered in .45ACP.....I think the GAP is destined for the niche market. My XD9 may have a big brother some time down the road.

Related to the GAP, while the GAP approximately matches the ACP in performance, it's maxed out in terms of potential while the ACP can get a bit more power with +P loadings. (I believe I read that somewhere in a comparison of the 2 rounds.)