Thanks, Phil! Looks like the W4 is in my price range.
I have an LP-100a. It's great, but after a friend had me repair their amp, I suggested they get a watt meter for tuning.
At Orlando Hamcation, he bought a W4. I've had it in my shack since then.
After using it for a while, I bid on one and got it for myself. It's a really nice wattmeter. I'd suggest you invest in a little calibration work to get it as accurate as it can be.
Also, it's not obvious, but you can remove the sensor portion and have it a couple of feet from where you put the meter cabinet itself.