auto limewater topoff question

[pells61]

ok folks its my birthday and i get to spend money!!! so i am now going to retire the old drip bucket for my limewater and am going to upgrade to a nice automated topoff system. The question is what should i get??? I dont know if i want float switches or just go with a meatering pump which i hear can be very loud. I have distilled my options down to two systems, the tune osmolator or the Spectrapure LiterMeter III, i just want to know if anyone has any input on these or any better suggestions. also if i do go with the osmolator is it a problem that my limewater will not just be dripped all the time but dosed in a substantial amount periodically during the day?? will this effect pH levels every time