i'm not sure when i asked dj about recone price, cuz i was thinkin about gettin my 15 reconed to an 18 when it come out, he said late summer, hold on lemme go find the email.
The HD315 works in 3.0-4.5 net cube ported boxes. We recommend 35-40 Hz tuning. The HD318 series will be out later this summer. We haven't arrived at an upgrade price at this time.
dj
there ya go straight from the horses mouth = ) lol
damm that sucks i was looking at getting my 15 reconed to the 18 same as you. and i thought that you canget your sub "moded" to fit your new system for free?