Hi John,
A very nice collection you have there. I’m not sure what sort of thing you fancy, but there’s a good choice on the plans and x list plans section of this site. You could do a lot worse than try cachalot
Cachalot MM1023 from the radio control ignition section. I used to run one of these with a racer in it and it gave me a lot of pleasure.
As an aside, when you choose one and start building, keep us informed, i’m sure there will be a lot of interest on here.
Charlie