Macdadtexas,
Have you listened to the Heresy II? Rebuild or replace the crossovers, but IMHO I don't think that the upgrade to III's will buy you all that much.
Now, if you are talking about rebuilding your IIs into CS-1s - that's a whole different kettle of fish. The CS-1 rebuild will result in a very different sound. I would say better*, but certainly different. But it will most likely affect the resale value.
*Disclosure - I own a set of CS-1s (former Heresys)
Have you listened to the Heresy II? Rebuild or replace the crossovers, but IMHO I don't think that the upgrade to III's will buy you all that much.
Now, if you are talking about rebuilding your IIs into CS-1s - that's a whole different kettle of fish. The CS-1 rebuild will result in a very different sound. I would say better*, but certainly different. But it will most likely affect the resale value.
*Disclosure - I own a set of CS-1s (former Heresys)