I have Spatial Audio Lab's X5s and I love them. They are easy to drive and I haven't even done anything really to set them up. They sound even better when the equipment behind them is improved (duh).
@jaytor do you think the GR Encore Studios are worth the price? They look interesting but are kind of pricey when there are a lot of good speakers below $2,000.
@soix I'm thinking you heard the X4s. Right now Spatial Audio Labs is only producing 2 models, the X4s and the M4s. I think this is due to parts shortages. The main difference between the X4s and the X5s is that the X4s have a passive woofer whereas the X5s' woofer is active with a hypex amp built on. I do think the X4s (newer) may have newer speakers although I don't know how much a difference that is.