Came into great deal today

Just got an excellent deal on 4 empty kegs for 10 bucks each, just not sure on how to utilize them. I have 3 since I passed one onto my brew partner, I know I will use one for a keggle, maybe one for a fermenter maybe the other for a HLT. I already have 2 cooler tuns one 10 gal round igloo and a 9 gal coleman extreme. Also which burner works the best for keggles? and what is the best way to cut the top, I have recip saw and air cutter with cutting wheel.

I used a 4 in angle grinder to cut the top out of mine. There is a thread of how to do that on here somewhere, maybe Bobby posted it?

Maybe I could just make a beer enthusiast wind chime out of them