I'm having the same decision. I'd like to support IRO but there are no local dealers and I don't want to order one without trying it first. KHS is out. It's pretty much between the Pista and the Langster for me...the pista with a front brake will probably end up costing about the same as the Lang (actually more, since I get a shop discount at a specialized shop), so I'm trying to debate fixie steel vs. freewheeling aluminum.

Pista advantages: ride quality, components quality?
Langster advantages: less fear of rust/abuse, freewheel + brakes more suitable for varied terrain riding, which is what I'll be doing.