As a first dashcam, DP200 is good choice within that budget. If you want something much better ( day and night video ), then you have to rise your budget.
I was also considering the Mini 805/806. How do these compare with the DP200? I've heard of some quality issues regarding the Mini series of dash cams.
Size / form factor wise I do like Mini 08xx -series, however it has some quality issues as you mentioned, which are not yet all resolved ( developer working on them ).
DP200 has no major issues reported, so if size is OK for you, it is a good choice.