When I was looking for a new boiler, I got information from 3 different dealers who were showing their wares at a local show (i.e. actively marketing). I followed up with each dealer by email and by phone. I only talked to one dealer, who I explained I wanted to come out and see my setup and quote me a replacement boiler. Since he had a decent drive to get here, I left it up to him to set the date so he could combine my trip with another trip close by. I NEVER heard back from that guy, nor ever had any follow up by the other two dealers to emails and phone calls. I finally talked to another guy with the same dealer (Central Boiler), who did come out. He was such a snake oil salesman that I was turned off by most of what he said. I know Scott on this site seems to be Johnny on the spot but these boiler dealers seem to be fly-by-night or worse in my opinion. I run a 100 million dollar dealership and we wouldn't last 5 minutes like this. Between myself and my local HVAC vendor, we're installing the boiler I have on order ourselves and to heck with the dealers.
I guess what I'm saying is, spend more time on the dealer than you do on the boiler. If these folks won't call you back, run as fast as you can.
Dan