There has been a noticeable uptick in interest in 'Streets recently and I am encouraged - if nothing else after all the effort and enthusiasm I have put into it - well, misery loves company.
Anyway, in my opinion, by a noticeable degree, the BEST - the absolute best - 'Streets vehicle ever made is the first: the original K-Line Ford panel van. There are various versions, product number K2629-xx, where usually the first X is a zero. Here is one, but they have others.
http://www.westerndepot.com/pr.../11/products_id/7912
These have a metal chassis, a F-N-R e-unit with an on-off switch, and a lighted light bar and headlights (at least some of them). They have lever-action center pickups (at least all six I have) and just run a bit better than anything else stock I have ever bought from K-Line by Lionel or WBB. The ones I have will run on AC or DC with the e-unit working on either voltage type. They run a bit slower, smoother, than anything else. They are definately not made to bash or modify: expect to use a blow torch if you want to cut the chassis - they are heavy and tough.
Western depot is the only place I have found these. I don't nknow how many they have left at the moment, but just a while ago when I ordered they had a number of models there, all K2629-something something, at fairly good prices.
The only downside of these is that they have very trainlike wheels - black, not very car like, so they look like the pilot wheels on steamers but - you can paint a silver wheel cover in the center, etc., and they look okay. All said, solid, good runners, good price, and they have e-units . . . unless you remove the recitfiers and run on DC, you won't get any other 'Streets vehicles to back up.