Guitar Effects pedals, what's your choice?

[iamnotafraid]

Okay dudes I've never been much for using electric guitar effects pedals.
But I'm getting back into playing my electrics and I'd bought a Boss SD-1.
And though I like what it does, when I have it hooked up it colors my clean
tone (pass through).

So what do you guys recommend that doesn't color your sound when the
units are not engaged? I don't want to spend crazy money so take that into
account.

Your help is appreciated.