lol, why don't you know about $4000 speakers????
they're P.A. speakers, prolly, since the amps are Behringer
Vintage electronics, depending on the brand, can be risky, since the cost of repair can be multiples of the purchase cost; scratchy pots, weird statics, etc.
I'm deaf and my audio lacks resolution in the highs, lows, and mids
it really depends on your speaker capabilities and demands; 4 ohm speakers can be hard to optimize with lower power, lower current amplifiers; that said, most higher end amps can be found for under 1.6K U.S. in used good condition -- but some people do make a lot of money and don't care
it's okay -- but it's underpowered for some high end speakers
a good proportion of the high end speakers are difficult to drive
some people just want well-resolved hi fidelity, though
ultimately, how much he pays is not really your concern; but if it is, you have other issues
don't go crazy on us -- 30W class A is okay for an 8 ohm rated speaker set, but it's not going to get the most from a 4 ohm speaker pair, or two -- if you're going to defy laws of electronics, then you need to buy more magical apple products, too
as for this, it's personal choice
tannoy mx1? not the best speaker
why bother with all this electronics fudging when your output sources are so-so
higher quality electronic components, and brand