Re: OD Pedal...
If you want transparency, go with the Keeley Katana (only problem is that it won't change your tone).
Most clean boosts, will change your tone in some way, they usually thicken and compress the tone slightly when used in conjunction with an overdrive channel. My Pro Analog Dual Drive did a great job of this while still preserving the fundamental tone of my setup and dynamics. A Klon would probably work extremely well for this application, but I've never used one.