You've been warned not to get the Q3.... If you can't yet justify a better box now, simply save up a bit more and buy later. Rather than buy now and later complain about poorer performance or incompatibility with newer apps. The Minix X6 is a much older device so I'd advise to skip that too. However, say your needs are quite simple and you are satisfied with their current performance, then by all means go for the MINIX NEO X6, at least its got the Amlogic S805 Quad-Core CPU.

My bad. .. Got thrown off by a Google search and kept thinking it's the Q6 which is dual core (Mixed up the X & Q). The Q3 is indeed a Quad-core device. Think of it this way, you've been warned against using the Q3 while the Minix has good reviews online. If you've tested both and are satisfied by the initial performance of both boxes, wouldn't it be a safer bet to go with the one with better reviews? Just make sure that whatever iptv service you plan on subscribing later on is supported on the Minix X6 as sometimes they r locked to certain  boxes like the Himedia.