Oh and to answer your question Scottie about the "order"...
I went something like this:
.357magnum, .45ACP, .9mm, .40S&W, and I'm waiting now on a 10mm.
However, I picked up an aditional pistol in .22lr due to ammunition cost being so damn inexpensive.
Everyone should own a .22lr pistol and rifle.
You can become a better shooter no matter with what you decide to get. It just takes good old fashioned practice and that is where the .22lr's come in.
I love my Ruger MarkIII - I rip through a dozen mags, then go to the big gun for a a couple magazines, then swap back to the Ruger for another dozen.
Range times are now longer than I need (hate it when it feels short), fun and very very inexpensive.
When I was just going to the range and ripping through 300 rounds a weekend of .45acp (each weekend - I also don't reload), well, let's just say in 1 month it's adds up fast. Multiply that by 12 and that's alot of extra cash
Now I go through 50rnds a weekend of centerfire and 300~500rnds of rimfire. So much more cost effective and still very very fun (which is why I felt I could splurge and get a 10mm haha)