Austin - The spring setup has been tested by Hotchkis extensively on the track and has performed very well. I have Eibach's on mine and will be switching to the Hotchkis after seeing and driving a WRX that had this on. There will be a Competition Coil Spring set made by Hotchkis but I do not have the specs on those yet.
jblaine - Link fixed, thanks for the heads up. As for the end-links, we only have the F+R available from Hotchkis at this time but have relayed your message about selling them separately. And the pics you requested is attached to this post.
wrxified - I believe Hotchkis developed these rear support brackets based on field experience of lots of rear OEM support bracket breakage but very little front bracket breakage. I personally broke three ( two rights and one left) OEM rear support brackets and no front ones.