There is a brief review here [below] on the Orion F7.5 ED120 on 'Andys Shot Glass' . He compared it with a AP 130mm APO and basically he says it performed to within 90% of the 'top end ' Astrophysics APO. Some of the other brief overseas forum comments indicate that CA is not obviously worse then the F/9 ED100 version and can take 300x easy. The price you quoted above would appear to be good value - the Skywatcher, Orion and Saxon have the same FPL-53 lens with the Crayford focuser - just different paint schemes. Bintel quote $A4800 for the orion ED120 version ! Hopefully that will come down. Bintel are also are advertising the Meade 127mm 5000 triplet APO for $A2800. The delivery dates for these are still unsure ? end of year. It surprised most why the ED120 version was far more expensive then the Meade triplet 127mm APO - however it is important to note that new Meade APO uses 'FCD1' lens [by Hoya] which is equivalent to the earlier FPL-51 lens [as used in the earlier Meade APO telescopes]. FPL-53 gives about 10% better color correction then the older FPL-51 / FCD1 lens. FCD1 is an really an 'entry' level APO lens and Meade no doubt will be hopeing to get improved color correction by making a triplet lens. The ED120 uses the more expensive and better CA corrected 'Ohara' FPL- 53 glass - which is almost pure fluorite and is up to 3x times the cost of the Hoya FCD1 lens used by Meade - hence the price difference. There are issues also with getting 3x lens absolutely aligned - plus they have longer cool down periods. A full review of both the ED120 and Meade 127mm will be interesting untill then the Saxon ED120 version looks tempting.
http://www.andysshotglass.com/120ed.html