I own a six year old VU+ solo 4k, which has similar specification to the Gigablue Quad 4K. I`ve owned many test receivers since and always go back to the solo 4k as my main box. It handles everything i can throw at it and doesn`t need to be upgraded yet. So for me the DUO 4k SE is an investment that should last many years without worrying about upgrades.
I`ll point out the main comparisons that should help you make your decision:
Excellent - if you've been using your box for 6+ years, and still happy with it (even after sampling many others don't feel an urge to upgrade) - that is very reassuring (and also gives an indication of ongoing support etc.).
Thanks again for your time/giving the benefit of your knowledge; I think I'm now definitely leaning towards the Vu+ :thumbup: