Haddo, welcome to the cantina. You will find the 15" Sirupati very light compared to most any other Khuk except the little KK. My wife has used it in the kitchen a lot more than I would have outside.
When you get to the 18' and 20' knives, you are talking about some working tools. I will get me another 18". I used it an awful lot and it just got sharper when used on green wood especially.
My wife is going to give me back my 15 incher. I made a kitchen knife for her that she likes better. It was not because of the knife. She has weak wrists from stripping wires in all the years she worked in electronics. Yea, the 18" snake killer will have to be replaced.
Try to enjoy the HI folks Haddo thay are a good bunch. Uncle Bill will treat you right.