I suppose it depends on what you want to do with them. Regular carry? You might want to stick to pistols with similar caliber and operational functions to maximize training consistency. Range fun? A variety of models and calibers might be more desirable. For collection, display, or future value? Save a LOT of money and watch for opportunities to pick up the more coveted and highly regarded models. A lot to think about! Since I turned 21 I have bought exactly two pistols for myself--the first on the day I turned 21 was a Ruger P89DC that was my carry gun for close to twenty years. Ugly as hell, not too accurate, rattled like crazy, but reliable as hell and never had a single failure despite thousands of rounds of the crappiest surplus ammo I could scrounge up at gun shows and no maintenance at all outside the weekly cleaning and after each trip to the range. After many years of reading, considering, and saving pop can money, I got a P30L to take over the daily carry duty. But the HK bug is indeed contagious and the onset of symptoms can be fast--in my case it has actually been a couple years since I got the P30L but now I am desperately lusting for a P2000SK to complement my p30L. So have fun with the collection!