Calderwood was a good manager for us, however nowadays i fear he would be like Jefferies. For me, its important that our next manager should be someone whose young yet has experienced managerial success. Bollan is a good shout, yet the issue with him is that he's under contract with Airdrie until 2016 and we aren't in a position to fork out compensation money, so i very much doubt he will be considered.
Also i agree with you in regards to the potential issues with Potter going back to working with the U20s. I am not convinced that will work, yet the board should leave that decision up to the new manager.
Edit: Just checked Aitken's contract status and according to this he's under contract until 2016 ( if so), http://spfl.co.uk/news/article/aitken-extends-stranraer-stay/ , yet according to other sources he's only contracted until the end of this season? Need some clarity on that one.