All the brands you mentioned will be good quality, accurate tools.
Do you want an 8", a 10" or a 12" saw and what is your budget? All will give you around 280 to 320mm 90 deg crosscutting capacity, however the max. depth of cut will vary from 60 to around 100mm. One feature I would look for were I to buy another saw would be an accurate depth stop with fine adjustment, and one that can be set to depth but swung out of the way for full depth cuts without having to readjust the stop every time.. This is extremely useful for cutting halving joints and tenons etc.
The Electra-Beckums have induction motors which make them very quiet. The disadvantage though, is the extra bulk of the motor reduces the max. depth of cut for a given blade size. Belt-drive saws also are smooth and quiet.
The quality saws tend to have better precision gears, bearings and motors, and will work quietly, smoothly and without backlash, endfloat or other annoying attributes that can spoil the accuracy.
The Makita LS1013 is widely regarded as one of the best on the market, and thats the saw I would have - no question. They have also just launched the LS1214F - a 12" version, but of course they are expensive :shock: .
cheers
Ike