Question for Heavy Mains

I normally play Medium and Light almost exclusively due to me just not liking too many of the Heavy class's weapons, although you sledge players are true inspiration. This is changing with the dual Deagles. I'll probably end up playing a bunch of heavy just because of those. So my questions for you Heavies:

What are your favorite specializations and what are your thoughts on what will pair well with the Deagles?

What are the gadgets I should work on getting better with? I've gotten pretty comfortable with the barricades, just thinking on what I should add to the wheel.

Appreciate any input!