I also recommend one of these:
D4-V UV System For Home Plus Water Disinfection- VIQUA
I have the Trojan UV Max (installed it when I bought this house), essentially the same system. No issues. The only complaint I have is the cost of replacement lamps adds up - it's like a printer where the manufacturer make their money on toner sales, not the equipment per se. Same here but there are ways to economize and not get ripped off.
As a technology it works very well and I've had no issues at all.