Dude, all these pedals will ultiamately give you only one particular tone.
You need to decide whihc one suits you best to play wider variety.
I have heard ppl playing Smoke on the Water with a metal tone, and they manage to pull off pretty well.
If versatility is what you are looking for - then get hold of a digital processor. I guess for around 5-6 K you may get a decent 2nd hand one.