I don't know where you are in Denver, but Vapor Leaf in Lakewood had a good assortment of tanks and mods when I was in there over the summer. I got there early in the morning, and met a nice guy that seemed willing to talk about something other than Cloudz. By the time I left, other customers and staff were there and it was starting to get a bit foggy.
I've ordered from
VapeShop located in Castle Rock, but never been in their store. If they are close, it might be worth a trip to see what the store is like and talk to the people. I've been happy with their mail order, and they will discount future orders if you make an account and keep buying from them.
My preferred tank is the Nautilus X with a 1.8 ohm coil. I'm pretty much MTL, but will use the Melo III from the Pico 75W mod kit when I want to subohm. The Nautilus X also has a quad flex survivor kit that allows you to make different styles of tanks out of the parts. The Nauti X is a love it/hate it tank from what I've seen here on ECF.
The Pico is a nice little mod that will let you do a range of watts, but limits you to the 22mm tank because of the battery cap.
Do you have any of your old gear that still works? It might be worth finding a flexible mod that you like and then a couple of different tanks to try both DTL and MTL vaping to see what works with your mood and juices. If you do start vaping more than smoking, you may find that your taste in juice changes as your body adjusts and heals from the smoking. You can always cut your higher mg juices with PG/VG if you need something with lower nic after a while.
Good luck with your journey.