Hi faust,
Unfortunately I'm not in Taiwan, I'm located in Seattle, USA area. But if you ever visit my city I welcome you to drop by for a demo of my budget setup. =) I don't use LINE but I use WeChat. You can private chat me for my WeChat name.
Back to music and speakers. First of, my apologies I forgot to ask if you're a computer, CD or vinyl person. If you can tell me more about your setup, I can give you more advices from my experience to help you spend the least amount of money (I personally am very frugal as well, haha).
My goal is to try to help you listen to the B&W speakers with a guarantee baseline. Based on my experience with B&W, I can help you demo these speakers with gears that guarantee to sound good with the 800series, then you can decide for yourself how the speakers perform under ideal circumstances, hopefully by using common consumer audio equipment available at good audio shops. You don't necessarily need to buy any of the gears I recommend. You just need to know how the speaker sound at their best while demoing at the shop, then you can slowly upgrade your own equipment over time at get to whatever level of C/P you deem acceptable.
Below are purely my personal opinions:
#1 reason contributing to people complain B&W speakers are bright sounding is because they listen with equipment and speakers that are not warmed up or not broken in. My 805N and 805S were both HORRIBLE to listen to until they're broken in. Once broken in, they're so transparent that they sound cold and brittle if an amp has not properly warmed up.
#2 reason contributing to people complain B&W speakers are bright sounding is because they pair the speakers with wrong amp. B&W 800 series require amp, like your Class A Accuphase, that can double down power. Most amps can only do x1.6 (ex: 100watt at 8ohm, 160watt at 4ohm). There's scientific math behind this, but in layman's term, in order to maintain quality sound across all frequencies an amp must provide stable 'quality' current across the entire ohm range that the speakers perform at. For the B&W800 series, it means using amps that at minimum double down in watt from 8ohm to 4ohm and preferably further double again to 2ohm (a Mcintosh with autoformer while expensive to many, is actually among the cheapest amps that can double down from 4ohm to 2ohm) because the 800series dip as low as 3.7ohm which is below 4ohm.
#3 reason contributing to people complain B&W speakers are bright sounding is because they use cheap speaker jumpers while directly plugging into the upper speaker terminals. B&W 800 series are built to be bi-amped at best (which most of us wont ever be able to afford), bi-wired at minimum (recommended by factor) and jumpers as last resort.
And the list goes on as we go up the equipment chain... =)