Use Fin-tecs -- they are nice set up. -- go to the Bomber store and go to Fin-tec heels - they have a link there telling you all about compatibility.
I also think you can change these Step-ins to standard Bindings by buying a few parts from the Bomber store..
my guess is your boots will work with Step-ins... I also think the Stand TD-1 s will still work if you use Step in heel piece,,, but please check with someone at Bomber to verify.
I only use step=ins...