I have an RM800 EVO III ( and had RM500s EVO I & II). All have been very reliable (over the last 5 years). That said - I know if there is a problem with them, Ashdown customer service is top notch and they would sort it quickly.
It is very light, EQ does what I need and it is VERY loud - the volume is not linear and it seems to increase massively from around 2'o'clock on the dial. I cannot put it much further than this and have gigged without PA several times.
Disclaimer - I am an Ashdown artist, so there may be a little bias here.