1. Does your current bike fit properly. If so what is the current stem length?
2. . If you are currently using a stem <100mm there is a good possibility that your current bike is too big (ie. top tube measurement too long and you are compensating for the increased reach with a short stem).
3. If you are using a stem >120mm there is a good possibility that your current bike is too small (ie. top tube measurement too short and you are compensating for short reach with a long stem).
4. If you are currently using a stem between 100mm-120mm go with the Lynskey that has the top tube measurement that would equal your current reach using using one of these stem lengths. 110mm would be ideal.

On compact frames, ST height is less important that reach or top tube length (if you don't know your reach).