RE: Back in after 20+ years
G'day
I learned back in 1989 and flew until 1992. I was really still learning at that stage but when I came back in about 2002 (10 years not your 20) I found that I was pretty well where I had left off and I suspect you will too. I had sold everything so I had to start from scratch too.
The four planes you have listed are all great. I have the Four Star 60 with a Saito 100 in it and I also have the smaller version of the Stick with a Jett SJ 46. Insane. The other two are flown at my club and are good planes too. You will find the OS AX 75 easy to get along with but the Saito suits my relaxed flying style better. A friend has an AX 75 in a 60 size trainer and it really hauls it around. We have found it a little temperamental on occasions. Another friend has a clone of the Tiger with an ASP 90 two stroke in it. It really hoots but can be a bit hard to tune. Does not like lots of nitro too.
Any of the current crop of radios will do the trick. The Futaba certainly will though I have migrated recently to a Hitec Aurora 9 and am loving it.
Welcome back and have fun. I suspect you are on the right track.
Mike in Oz
PS That's my 6 year old kit built Four Star 60 on the left. Currently building a Four Star 120 from a kit for a friend. Fun.