the big one: how do you choose speakers? By what features, data?

@lonemountain 

these are very good points. Obviously I am still struggling to define it "on paper" - given my room size, budget, other components, listening preferences, come up with a list of good candidates. I don't go to audio shows and my local shop is pretty "busy" for my budget, so my main option is trying different models with good return policy.

@grislybutter 

If you’re clueless and starting out the entry level is more forgiving because the price is low and you don’t need a serious amplifier. Anything from cheap class D mini amp to an old AVR will get the job done. If you just want to fill a small room with music (or watch movies) and are not worried about hearing every nuance (or having the clearest, fastest bass) then just get a pair of Q Acoustics 3020 or Polk R100 or Triangle BR02. To me it’s a no-brainer and everything else is a luxury. 2 channel listening is just awesome. 

@kokakolia

I am not entirely clueless but closer to clueless than informed. I did the first round (~$500) about 8 years ago and the the $1500 level 2 years ago and now I am planning to enter the 3K territory (2K used). I understand what I like, what I prefer and what is low priority on my list.

You probably pointed out 3 of the best values in the 4-500 EU/USD range, what do you think about the 3K range? 2500 to 4000 which I can buy for 2K used.

I haven’t read all the responses but I can assure you, that purchasing a Yamaha CR620 receiver for about $200-$300 and either a Legacy Signature III or Focus speakers for $1500-$2500 (all used but very durable/recap the Yamaha if necessary) will bring you fabulous sound at a very low budget cost. You can always move up in electronics but you will probably keep the speakers for decades (or until you can spend a lot more money). If you already have a decent preamp/amp, then the Sig IIIs are easy to drive, great bass and slam, gorgeous quick mids and spacious highs (rear tweeter). I use a 35 watt tube amp on the Sig IIIs in my living room. My main listening room Focus require more power with 6 12" woofers and lower impedance for tube amps, not a problem with the solid state receiver. that has good current/control.

Clarity

Tight bass

Synergy with rest of equipment