Anybody use EngineQuest cylinder heads?

The EQs are a great head choice for you. I don't subscribe to the Edelbrock bashers as all the sets I've used were fine, but IMO, they are too much money and less expensive heads will do what you need right now. If you foresee the project improving over time, meaning you may want to upgrade pistons, go a bit faster, or build a stroker, then I'd say start with the RHS heads. The actual cost to install isn't bad when you get them with the LA valvetrain. IMO, the magnum valvetrain sucks, and I can't justify the costs just to use it. The head ports are the same regardless of the rocker gear choice.
The EQs will be the least expensive and make great power on a mild 360, and decent power on a more built 360. Most MP heads are simply trash. Not because of the design, but because the execution sucks. The castings are terrible, and the machining is even worse. When you step up to the big dollar top ends, then you can make reealy good power with them. As for anything other than W2 for normal street or race... Avoid them.
The RPMs are good heads, with potential to be better than the RHS heads, but are about 33% more cash to get an assembled head. If you go with the RHS and magnum valvetrain, the cost is almost identical for the RPMs, and you have a heavier head that can't be ported as far as the RPMs can.
That's my opinion anyway.