Well, bit of a 2-fold question, I have my small caliber (.25ACP), and my mid caliber (9mm), I'm looking to expand to a large caliber. Without creating toooo much debate, I'm torn between 2 semi and 1 revolver caliber, and also looking for a good mid-price choice for each. .40/10mm - A bit close to 9mm, but could be a good size/power balance, but I hear it's expensive to reload. .45 ACP (or .50 AE) - Good ol' big rounds, but too big? .454 Casull - I could use a good powerful revolver, but if the costs are insane it may not be worth it.