I am interested in the JAKL as well but for what its worth, there really is not much difference between modernized AR18's. Its pretty cool that Stoner designs are more relevant than ever 60 years later.
As something different I was considering the MCX and APC from B&T, but think that I am going to get a BRN-180 upper to mess around with. Looks like an incredibly fun little blaster.
Also something thats pretty cool is that in the past, people would considering an AK or SKS as a cheap blaster, but now, its more economical to do a really good modern AR18 than a domestic AK