I bought the wicked edge pro pack iii... hopefully I'm happy with it!
Congrats, I don't think you'll go wrong with that system. I would also still consider the idea of learning to freehand in addition to learning your Wicked Edge--there are significant advantages to being able to do both!
have you used a KME or TS Prof?
Owned or used a lot, no. Inspected and played with (a TS Prof) clamping system, and read or viewed extensive pro and con reviews of KME including people here on BF, yes. And still would not choose or recommend those systems over an EP (in the mid-price range), for the reasons given above. And could give more. A big one compared to KME is, I don't think EP places so many limits on where/how you position the blade (because no clamp) and therefore makes it easier to sharpen down to lower angles. I know there are workarounds for KME, but that's been a critique even folks here have had of that platform going way back. Doesn't mean it's a bad sharpener at all, but OP asked for recommendations and preferences on systems--that's mine. In the mid price range, I prefer the EP's approach because it eliminates the whole tricky area of the clamp, and gives a good workaround that I much prefer for stability, which is the magnet with the slide guide. This lets you skip the whole problem of insecure clamping with some grinds, and of artificially edge angle limits due to clamps getting in the way, etc.
But for the real winner: Have you tried hands-on a Wicked Edge 130 system with the gen 3 clamps? I was always interested in them, but recently got to try one at a shooting buddy's house, sharpened a Wusthof chef knife and an S30v folder on a 130 that has their latest generation camming clamp system. You can adjust the tension on the clamp to tune it, and you can use different jaws for things like really thick blade stock, or smaller blades and low edge angles. Not quite convinced I
need one just yet, but yeah, absolutely would like one as a complement to freehanding--it is one impressive piece of kit. While I still prefer my E.P. Apex in its price range, if I wanted a really precise fully clamped system with repeatable settings, I'd have to give the nod to Wicked Edge.
I'd still vote for urging sharpening newcomers to prioritize learning to sharpen freehand first. There are so many advantages to doing that. But if you're gonna buy a system, and Sharpmaker won't cut it

, then Edge Pro Apex for mid-price range, and Wicked Edge if you want clamped/repeatable precision and cost is not an issue.