My personal favorite resource is HeadsUpRC.com. This is a small hobby shop out of Florida that sells online. I email Jeff with what I have, what kind of performance I desire and he sends me recommendations within a couple of hours. They usually ship your order the day you place it, often within an hour. Prices are competitive with other suppliers. Shipping is flat $2 on packages under a certain size. I think entire airplane kits would be more. Customer service is top notch. Drawback for many-they only ship within the US, to my best knowledge.