A couple of more things to consider in this discussion.
1. Regarding the use of tire warmers and heat cycles, it is my firm belief that if you use race rubber you should also use tire warmers, ESPECIALLY if you're in the Beginner and Intermeditae groups, and here's why.
Everytime you heat cycle the tire, you are elevating it's operating temperature. If you put enough heat cycles into a tire, you are effectively "hardening" the compound. A White becomes a Blue, a Blue becomes a Green, a Yellow becomes a Red, etc... More importantly, if you are running at a pace that allows you to get multiple days out of a tire, ie "B" or "I", then you're putting something like 14 heat cycles per event on your tires.
Therefore, when you go heading out onto the track on your race tires that have three events on them already, and it's an unseasonably cool morning (Spring/Fall) You may find that tire with 42 heat cycles on it will NOT get up to operating temperature before putting you on your head. Mostly because it was designed for one or two heat cycles, if you get my meaning.
2. This track world is all about rider confidence. It's so mental I can hardly believe it. The more confident you are in your equipment, the faster you can go. If tire warmers help you feel more confident, they are worth their weight in gold.
Those things being said, you should definitely support your regional NESBA vendor, and not order out of region, or out of NESBA, whenever possible.
Support the people and products who support you. It's good business and good karma.
Oh yeah, one more thing ... Chickenhawks rule! Because they make me feel like a god on the very first lap