Home gym question: What dumbbells do you use?

I am looking to get dumbbells for my home gym but am in a bit of sticker shock.

It looks like a set of 5-50 lb dumbbells from Rep Fitness will cost $674 (excluding tax) plus another unknown amount for a rack. A set of adjustable dumbbells for that same 5-50# range from Core Home Fitness would run me about $350. Finally, I noticed that Rep Fitness also offered adjustable dumbbells that would be about $150 for a set of 50-ish pound dumbbells.

Obviously the last option makes the most financial sense. Does anyone use adjustable dumbbells in their workouts? I am primarily thinking of movements like dumbbells cleans where the dumbbell will be making contact with the ground.