Definitely head north mate, you will be in the same position as you are in now when you hit 1500hrs as an instructor with no twin time. Better to make the move sooner rather than later if you heart isn't in it. Be prepared for some operators to take a look at your resume- see that you have no real world charter experience- and assume you are a 200hr pilot.
As long as you head north with the right attitude- as in accepting a new way of doing things and being positive- then you will fit in fine. In my experience it is the instructors which think they are gods gift, and try to teach their ICUS captains
how to fly the aircraft that they are doing ICUS on, are the ones that spoil it for the rest.
The way it is at the moment- if you get in with a company with 210's and a few twins (barons/310's and chieftains/402's) you will be flying the latter by the time you have 1000hrs. How long that takes depends on how many hours the operator does, but its a pretty good time to be moving up the ranks.
All the best