I have generally bought the cheap and nasty sprayers from Mitre10 for around $10.  The nozzles are bad, and their lifespan is generally less than a year.  But they did the jobs I needed them for.

I would like to get a better sprayer.  I want to get one with a wand, and preferably one that has a long spray distance and/or an extendable wand.  I'd like to spray my roof and stay further away from the edges than I can with the cheap ones, and I am starting to wet and forget (technically i use an off brand equiv) and want to spray the high sides of our 2.5 story building.  Not sure if I care if its hand held or backpack style, the backpack style would be good for my roof to save me pulling it up with a rope, but its only once a year.

Wet and forget sell one for between $150-$250 depending on the size, and for $50 there's a 3m extension wand too.  But I have no idea around the quality of their units.

I'm after suggestions for a quality unit that has a spray stream that will reach or at least a usable extension nozzles.   I want one that will last, and possibly one that will have replacement components like nozzles if that breaks in the future.

All advice appreciated