Kinda neat that you can switch the clean blend in or out.
But if you just need affordable, a used Boss LS2 is hard to beat.
For blending overdrive/distortion, the Damnation Audio looper looks neat. It has a phase switch, and I believe it's clean blend is low-passed, rolling off signal above 1000 hz. That would give you clean, undistorted low end but gets the clean mid and high frequencies out of the way so that they're not competing with the distorted mids and highs from the overdrive pedal.
Using a full-range clean blend with an overdrive pedal can get a bit frustrating because the clean signal can bury the overdriven signal, forcing you to maybe run more overdrive than you really want just so that you can actually hear it.