I think I've narrowed my choice down to either the QB-78, or the QB78 Deluxe, (QB78DI assume). But I think I read somewhere that the D models have some barrel issues. Of the two, which is the better?To make things worse, I read that Xisico is going to be importing a new CO2 rifle from China (SAG ?!?) that comes set up to use gas or HPA. Much to learn!!!, tjk