I believe it will serve You well, You won't need any amp for it, maybe in future, but amp will not make it sound better, as SB Z DAC will be Your bottleneck. I'am using ZxR for music and games, Z have 100% same software features so should be as good in games. If Yuo most into games/music don't try to go super Hi-End it is not the case, games as source for sound is rarely a very HQ source, maybe movies, but IMO movies in headphones is not as enjoyable as external set-up in any case
And Aune T1 won't give You game features like DolbyHeadphone or Creative SBX surround, witch is very useful in game. Only if You will send processed signal to Aune RCA inputs.
I believe only music can open external dac/amp potential, wouldn't bother with gaming..
Both games and movies can sometimes sound very good...
Much like with music it varies from piece to piece.