Peerless 830873 + Vifa XT

[Tomac]

I was thinking of building a 2.5 way double transmission line with these drivers. I actually already built simmilar enclosure using cheaper drivers, used mathcad and mjk worksheets to simulate response. The speaker came out pretty nice. Friend of mine heard it so he suggested we should build another enclosure but with better drivers. I found that Peerless HDS Nomex 830873 fits perfectly in my pipe due to simulated response (it is a short 115 cm pipe,one driver is backfiring because of baffle step). Haven't heard this particular driver, heard previos series of HDS and I liked it. I guess that new series should be simmilar soundwise,and as I already heard Vifa XT25 i thought that it could be a good combination. I also wondered that XT19 could also work nice in these combination as Peerless could be crossed relatively high if the response curve published is true.
Has anyone tried using XT19? How low could it be crossed and how steep? Has anyone used Peerless 830703? could you compare it former HDS series?

[Tomac]

No experience with any of these drivers? I cannot believe that nobody used XT19...