Yeah dual sport all the way.
Maybe KLR650 as a low cost learner machine
I hate to send you down the cruiser road but that at least gives your legs some stretch.
Friend was 6' 7" and near your weight and was okay on a KLR.
There are ways to make the seat higher and the pegs lower.
You are not alone out there
http://www.motorcycle.com/top10/top-10-motorcycles-tall-riders-adventure-bikes.html
http://www.motorcycle.com/top10/top-10-best-cruisers-for-tall-people.html
I suspect the value for money would be in the KLR and they are bullet proof. You can buy for $3-4k, ride for a couple of years until you are 25 and then insurance should drop and you might have a wider range.
Getting off the pavement a bit even on gravel is very good training for a new rider and a dual sport gives you a much wider choice of roads in Ontario and the KLR would even get you to PA.
The dual sports have the suspension to deal with the weight ( I get a nice sag on mine to reach the ground

) and KLR has lots of after market choices to raise bars, raise seat and lowwer pegs and alter suspension.
Killer is in Ontario insurance goes by CC.
IN Australia the KLR is a learner machine.
But it is a well proven design ( 20 years without a substantial change and then for the last 7 not much difference ) and it's designed to handle a fully loaded marine.
you might be very popular on certain kinds of rides due to your "heavy lift" capability.
This is the same year I ride in Australi event to the colour. It's got some deccent upgrades but zilch mileage. Mine has 50k km with never a hiccup ...it has started in the worst conditions.
http://www.kijiji.ca/v-motorcycle-other/barrie/klr/1071800773?enableSearchNavigationFlag=true
Suspect someone got in over their head. From what I can see i's got some good stuff on it and most important the doohickey is done.
Bark busters, frame sliders and nice with highway pegs to let you stretch out.
Top box mounting.
I emailed the guy for a list of bits that he put on that might not mean a lot to you as a new rider.
For instance the frame slider protects the bike in a fall, bark busters protect you hands and the brake/clutch
The seat design of the KLR lets you slide back without a sharp butt rest which can cramp your legs.
Cheap enough - ride for two years - sell for $2k
•••• heard back from the owner - and a good top case with it....that's a $$ farkle and very useful.
Hi yes lockable box flashing brake light seat braded brake lines crash bars skid plate fork brace bark busters folding mirrors 1"lowerd low front fender beter air flow to the rad new tires fome air filter adjust ed carb will install a new batt dident ride last year bad hip
Good deal for someone OP.