I have only two thoughts about this
1.) If you data is all here now and you only use the program to sync data, why bother,using Ancestry for sources is OK but others without paying can not see them anyway.
2.) The computer is a personal decision and is going to be a lot of work transferring everything, I know I just bought one, but it provides a good time to start over and decide what you really want it to do, so take your time and do a lot of research on not only what type of computer but also what programs are really needed or wanted.
I know very little about Apple products but from others that are family I have seen some problems there, I am not putting down their products but for me at least it is not worth the effort to learn everything all over.