I have DM500s, DM7020, DM800, DM500HD, DM800se and DM8000...
And I would vote this way :
1. DM8000
2. DM800se
3. DM500HD
4. DM7020
5. DM800
6. DM500s
For the small difference of price comparing a DM800se and DM500HD, i would choose DM800se.
Comparing small price difference between DM800 and DM500HD, I would choose DM500HD for sure.
TS