The only thing I consider good are the following
Imod + rockbox + lod + headstage arrow (Wont consider a fatter stack since I have a home rig.)
C3 (hands down best I have heard from any hp out player
clip zip (for gym)
all for different uses.
Everything else is middling/average overpriced and underperforming in the sq department. That said I havent tried the 801 or the ibasso.
Heres a list of what I have owned (not tested/tried but actually plumped up hard cash for) in the past year: in no order.
Imod (brilliant but needs external amp making less portable)
c3 (brilliant but wont drive my high impedance (150+) cans great, not an issue as usually used with iem)
clip (boring sound sig but noting offensive and fine for the gym, amps well when needed)
s9 (slightly above average, great bbe enhancments)
d2 (same as above)
rocoop (craptastic firmware, hiss, nothing special on the sound)
studio (absolute hissiest player I have ever heard in my life)
studio 3rd anniversary (craptastic firmware, poor sound, shockingly overpriced, I believe to be a con, still hisses.)
ck4 (good sound, bad interface)
phillips go gear (above average sound, can be had very cheap, slightly slow UI)
itouch (average)
iphone (average)
hm-601 (very average sound, craptastic UI, craptastic battery life, looks terrible)
Cube c30 (Excellent sound, powerful class A amp)
S:flo2 (terrible UI poor battery, great sound)
DX100 will never get a look in for me as I have a home rig so wont be carrying that thing around. Could sound good though by all means but I just dont personally see the point in it.