While I haven't used the Conquest HD in 10x42 I've had it in 8x42 and 8x32, so let's say I'm familiar with the range, and I wholeheartedly agree that it's just a mind-blowing idea, I totally agree with Allbinos summary of the 10x42:
"To sum up the Conquest HD 10x42 is so good that personally I find it rather pointless to spend significantly more money on such models as the Leica Ultravid HD Plus, the Swarovski SLC or even the Victory HT. Of course different customers have different preferences; I admit that e.g. the casing of the Conquest HD is not as shapely and handy as that of the Leica and the Victory HT corrects the chromatic aberration better. For many people such details might be decisive. Still they cannot change my personal opinion that among the aforementioned pairs of binoculars belonged to the premium class the Conquest HD features the best price/quality ratio."
Anyway, I also agree with ZDHart that sometimes the difference in reach between 8x and 10x doesn't seem "highly significant", so what I wanted to propose is something that can give a definite difference in performance/use, for example a light 10x50. I'm using the Vortex Viper HD 10x50 and I'm quite happy with it. Size/weight wise it behaves pretty much like a 10x42. The Conquest HD 10x42 weights 795 g and the Viper HD 10x50 hardly 805 g, so a 10 g difference (1/3 of an oz.).
Yes, I know the Viper HD just can't match the Conquest HD in many ways, but for low light they will give you something remarkably different to the 8x32.
Yes, I know some people don't like Vortex, but there aren't many light 10x50 out there, even the relatively compact Ultravid series goes up to 1000 g, and the build quality of the Viper HD is very nice.
Yes, the Viper HD has a lesser performance, but it also costs less than the Conquest HD, especially in the US.
It's just an idea, coming from someone in a similar position. My main pair is an 8x32 (and ELSV in my case) and for years I've wanted something with more reach, but many 10x42 just don't seem to offer a clear advantage. For example, the 10x42 SE is nice because, having a flat field and being very bright, is also a nice complement for backyard astronomy. So I've been playing with this idea of something to compliment the 8x32 and I've tried many flavours of 10x42, 10x50, 12x42, 12x50. Currently I'm trying a IS 12x36, but for pure birding/daylight use I say it has too many caveats (CA, soft image).