The only GNs I knew that got hired in the ED were techs that worked in the same ED for several years and had established relationships with the nursing management. And even then, they didn't hire all the techs that went ahead and finished RN school.
Why would you subject yourself to nursing school, working in a crappy department for a year to audition for job in a good department(which even then your not GUARANTEED to get), and then working another year to just be in a position to START applying to crna school??? This makes no sense to me.
If anesthesia is truly your passion, you would take the route that gets you there the quickest. AAs and crnas are equally skilled and well trained. 5 years from now, the route you choose won't matter....But spending 3 years in the nursing doldrums when you COULD have been practicing anesthesia as a mid-level is something you might seriously regret.
I'll tell you right now I couldn't be able to stomach the BSN nursing model for an entire year: the "hold the pts hand and speak to their soul" dogma and dumbed-down science. If you can, then by all means go ahead. To me, the decision is a no-brainer.