I've been shooting SASS here in South Kakalaki for about a year and a half now. It is a blast and you won't meet a nicer group of folks to shoot with.
I'm in full agreement with Noz. Don't feel like you have to buy anything before attending a match. You will learn more in one hour of talking to cowboy shooters and comparing different guns back-to-back that you will in five years of reading. We always beg people not to buy stuff before they come out and shoot a couple of matches with borrowed guns. We see too many people that buy guns that don't work out and then have to buy again. As you said, the guns are too expensive for that. Instead, try out several choices, decide what will work for you, save up (if necessary) and buy the good stuff. "Buy once, cry once."
If you have not yet located a local club, here is a link to SASS-affiliated clubs in Virginia:
http://www.sassnet.com/clubs/Clubs_list.php?state=VirginiaCall or email the contact person for the club near you and tell them you are interested in seeing what it's all about. I bet they'll take you in hand and welcome you to a match. Some clubs have "new shooter clinics" or "practice days" as well.
In my area most people are shooting .38 Special, mostly out of .357 Magnum-chambered guns. No problems at all and the .38 is lots less expensive to "feed". The really fast shooters like the lower recoil. You'll probably hear a lot of advice to go .38 (I did). But after trying several guns you decide you LIKE .45 Colt, go for it. A friend of mine decided to shoot the .45 and I have to say there's something charming about it. Also, if you ever decided to shoot Wild Bunch matches the .45 caliber rifle is legal whereas .38 is not.
If you decide to to with .45 here's a screamin' deal if you don't insist of a fancy finish on your revolvers:
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=245520982
Send me a PM if you want more info. Happy to help.