I was reading my last post and noticed it looked rather blunt, sorry about that, I was trying to keep it short.

Also going through your engine selections was thinking back and had to chuckle. If I remember right, about 80 percent of those guys at the club swore by OS. "If it's not an OS it's not an engine", so I wouldn't buy an OS if my life depended on it. Basically they are all good engines, if you take good care of them. Read through the manufacturers support forums before you decide. The only ones I could see to really stay away from were the ABN (aluminum/brass/nickel) engines, the nickel would peel from the sleeves. If you go for the LA or brass bushing type engines, you will need to add more oil to your fuel to keep the bushing properly lubricated. Adding oil is not a bad idea anyway.

Another good place for information is at your local flying field. Most of those guys have flown a few planes and can help in the decision of a good progression, what size aircraft are right for your field, and any other questions you might have.