Lang, I've heard good things about finnex heaters:
http://www.championlighting.com/home.php?cat=743
they come in higher wattages, titanium so no worries about broken glass. You might not need as much heat as you think. Lighting and pumps do a lot for you. But remember, have at least 2 in case one breaks. That way your temp won't plummet.
I've never used a crimper for loc-line. Not saying it's easy, but it can be done.
Your call on the bulkheads. I'd say with the commitment you've made with this tank, it's gonna be around a while. Personally, i'd use slip and plumb directly to PVC. But that's just me.
Stand looks amazing. Very unique my friend!