Look at Mig-21, very nice plane. Not much complicated systems but hard to learn fly properly.
For me the best module in DCS is Tomcat. Don-t worry about Jester, he is a nice guy But to know al the F-14 system the 50 hrs to master the module is not enough.
The F-86 is nice, if you like it, take it. Migs are hard opponents but can be defeted. But more fun is at multiplayer. Also Mig-15 is realy nice plane at the same cathegory as Sabre.