I am looking into a pellet boiler and was wondering if anyone has recently installed the Harman PB105 with a storage tank. I am wondering if the expense will be worth it in the long run. I was also looking at the Tarm but it looks like an additional 3000.00 to purchase the boiler. Also, are there any other vendors that make a good storage tank? Again the Tarm tank is about 4500.00. Any help or suggestions would be appreciated.