I used to have a Hot Rails in a Strat. Sounded perfectly
Decent. The Tone Zone S also gets good reviews.
A couple of weeks ago, I found some old Jackson rail humbuckers in a drawer, and decided to make my parts-o-caster passive again. I put a Wilde L500XL in the bridge, and a Jackson J200R in the neck, and a push/push potmeter as the only control in the guitar. Sounds awesome, and just having the one control makes it such a simple and good sounding guitar.