I'd like to order some track to play around with. Not wanting to buy something I'll end up replacing later I've been looking at the options and I'm not real sure what I want to go with. I'm thinking along the lines of Code 83 track. Peco and Altlas seem to have very limited options for special track pieces, such as curved turnouts and I keep reading about Atlas supply problems. Walthers/Shinohara is relatively expensive but with extensive options. I see recommendations for Micro Engineering, but looks like they only make #6 turnouts. I'm also confused on the advisability of mixing track?