I need something to control weeds in many of our clients' flowerbeds. I think roundup will work best, because it takes so long to manually remove all the weeds. What kind of backpack sprayer should I get? I looked at a SOLO that came with 3 nozzle options and it had a 4 gallon capacity, a plastic wand, no agitator, and a piston pump. It was $96.25. Is that a good sprayer for the money? I also found a FieldKing for about the same price, but it had a brass wand, only one nozzle, and it had an agitator that would allow for some wettable powder applications. Thanks, have a great day!