There are plenty of boards with many more features than the blackheart:
Virtue, Tadao, APE and my personal favorite the Lucky Stage 4.
These all add some cool features to your ion, better eye logic, more adjustment, the ability to use a membrane pad instead of the on-off.
The stage 4 even has the option of using a different solenoid, which is a bit quicker far more reliable than the stock one.