I started with the x1 and then the hd70..... The x1 was actually sold under many brands with many logos and spec differences.(I just found my notes on it today while cleaning along with the SP4800 firmware I flashed it with.
It took a while for people to catch on I think we will see history repeat itself with the hd131xe and 25e and 131x-hd25
My hd70 was my second setup and then hd65 and hd66....all of these are still in use but the x1... HUGE improvement for me with the hd131xe.
I haven't used the X1 for many years. The HD70 took over long ago. (In a new upstairs HT.) But I decided to reinvigorate my basement HT with the HD131XE and before I took down the X1 I looked at a bit of Bluray through it. Although it is only a component input I was amazed at the seeming hi definition of the image. Of course it is only ED but what a beautiful picture. As soon as the new mount arrives the HD131XE goes up. Looking forward to it.