SDA 2

I recently purchased what I believe to be very early model SDA 2 based on the fact that the interconnect connector looks like an XLR cable with only 2 pins.

I am enjoying their unique sound. I have 2 questions:

1) Should I update the crossovers and tweeters or save that money towards the purchase of some type of larger newer generation SRS model?

2)I have found I seller, crossoverchef, on eBay that provides crossovers. He appears to be highly regarded. Does anyone here have any experience with his products?

Thanks!