I can address this one:
First: the 124 grain 9mm bullet is by far the most popular choice for a 9mm bullet in the world, offering the best overall compromise between the "snap" of 115's and the "push" of the 147's.
Second: I can pretty much guarantee that you will love the new second generation bullets (All flavors, not just the 9mm's). After a long tortuous journey "Aim" finally got them into production as of last weekend, and I had a chance to do some accuracy testing with them today. The 124's are a new profile with most of the mass in the back (where it belongs) for stability and longer bearing surface. 25 meters indoors at Guelph; off-hand, 30 rounds into a group a little smaller than my palm...say, 2 1/2 inches with a few called fliers (my fault, not the bullet). Note that I was freezing cold and couldn't feel my thumbs at all, and had people banging away on both sides of me, the left side of course being another Open gun which was buffeting me with comp blast. So obviously not the best conditions for serene accuracy shooting. At 15 meters off-hand, 60 rounds into one hole.
I would postulate that these will shoot really well out of 99% of the guns out there. Being hard cast, they can be shot to major velocities with no issues, unlike most copper plated bullets which use soft swagged cores. Alex S's SV AET Open gun ate them as well, shooting 50 rounds into one ragged hole with a few fliers (approximately 2%) at 15 meters. Note that his gun probably has probably the sharpest rifling I've seen in a pistol and frankly, I'm surprised that a plated bullet...ANY plated bullet...can be shot out of it at all. Proof:
http://i233.photobucket.com/albums/ee1/relliott_photos/100_0629.jpg?t=1235869128
http://s233.photobucket.com/albums/ee1/relliott_photos/th_100_0628.jpg
Anyway, for your information: everything they are selling is now double-struck and inspected and plate thickness has been increased. They are determined to produce a quality product, so if you are thinking of trying them....well....just try them.