You are bang on the money, though it depends on how much you want to shell out even for weekend cruising. dyna gives what, 12/15 kmpl?? not sure.will have to check..It's a beauty no doubt about it and I would have gone for it if I had money to throw..Depends on what is ur idea of weekend cruising is..even if it's just 100-200 kms, you are shelling out around 1.5 to 2k on petrol...every weekend. I used to shell out that kind of money on booze every day when I was single...Now it doesn't make sense to me. Also I'm looking to use this bike as a day to day bike so mileage was a very important factor in making my decision.And I would consider 6 gears also a plus. Some of the reviews on the ST7 did mention the need for a 6th gear(st7 has only 5). This again did not affect my decision as I don't think I am ever going to require the 6th gear!!! (Don't have the balls to go at very high speeds on a two wheeler)
I would consider the shaft drive on the intruder as a big plus..Nothing ever happens to them for long long periods of time.
You are absolutely right about the chrome look parts on the ST7 being of fibre glass and not metal...I really didn't have an issue with that, especially since, in mumbai, with the amount of salt in the air(I live 500mtrs from the Sea)the less metal the better. Makes the bike lighter thereby giving a better mileage...I'm sure , a lot of people see this as a negative, but the bike has proper chrome on the metal parts that matter to me.