The Nautilus Aspire, especially with the BVC heads, is a great way to start but you can also get a great vape from less expensive things like Kanger Evod or PTM2s so don't rule those out. Either way you'll do great.
I'd suggest a Vamo V5 since you said you like the idea of being able to swap batteries on the fly. The MVP is a great device with battery built in so you don't need a charger and batteries to go with it but, if you let it run down, you'll need a back up to keep vaping while it chages.
Just more options but glad you're looking at vv/vw instead of mechs at this point, good on ya!