If you can't afford to buy the L series lens, forget it. Moving up to full frame is very expensive, Peter Salas has it right.
A couple of 40d's with your 2 lenses would be a better workable system. As you mention "candids or…
Great image I was only there 40 mins and it rained for half that time Ha Ha Will defo return and would love to do some sunset stuff there
Welcome to PS hope u enjoy Will look forward to seeing your work ....D