I suggest save until you have bigger budget, then consider adding a dedicated stereo preamp with HT bypass followed by adding an external DAC.
My own journey of combining 2-channel with HT was a painful one (money wasted). Eventually I settled with semi-DIY passive preamp (fully balanced silver autoformers for 2-channel with another 3-channel copper autoformers for HT channels, working as slaves and will follow stereo volume). I use Oppo 205 analog outputs for HT, started with Oppo 95 initially, XLR used for main channels. HT signal processing and channel balance all done in Oppo. Whether in HT or 2-channel, it's always pure 2-channel audio quality.

