Well , there are some XP-E hitting the market .. Are they worth having ?
Just depends on your needs .
I pulled the Cree XR-E Q5 from my Micro-L2 and put in a SSC P4 only to find the SSC P4 sucked , so I then put in a XP-E R2 and it was only just able to match the Q5 I took out , but with lower current , about a 300mAh saving .
To some this would be a major gain , similar output with 30% less power consumption . Personally I think XP-E has some maturing to do , as may XP-G .
XR-E is still a good option , it has matured , and is capable of taking some abuse . Just depends on the variables .
Unfortunately many manufacturers buy too much stock to get a good price , there still pushing old Luxeon , etc lights out there , possibly due to stockpiles of components ... Getting the latest and greatest seems to be hard ..
Id love to get the best SSC P4's , Luxeon K2 TFFC's , Diamond Dragons etc