if your absolute criteria are Android TV, DA, DV, and DTS:X? and you want the best possible experience with minimal hassles available today? You'd be hard=pressed to go wrong with the Shield. Others are still forced to play catch-up. Primarily because Nvidia is a HUGE hardware & software company with literal armies of experts at their disposal. So maintenance and updates are pretty much guaranteed. Plus, getting things like Netflix certification is significantly harder for non-American (Read Chinese companies...USA-China trade war not helping) TV box manufacturers.

Confirm no dedicated DV support on pretty much other lower-end boxes. Leaves you that choice... Get the Shield. It might be overkill but since you've got a DV TV and other equipment. Shouldn't be much of a financial stretch to grab it instead.
Yep.. That high cost is due to the IPTV service and not the hardware itself. Example, they are charging RM5xx (RM700 also got)  for the EVPAD 5SMY (unspecified 2GB RAM + 16GB ROM) with "lifetime" viewing. That service no cheap. So to make profit, box probably cost them less than RM100 per pcs.. The rest is you having paid for a year or 2 IPTV sub. I'm not a fan of their hardware or business model. But people who tend to buy it usually don't care other stuffs like some of us do.. Just care to switch on and watch channels & VOD. If that's you? Pull the trigger.. Worst case is the service suddenly dies or is blocked. No Refunds and you are now stuck with that box which might not play friendly with other streaming apps.