Clickfunnels Pricing is pretty straightforward...
The standard plan includes most of the functionality of clickfunnels, but with a restriction on how many visits you can have to your clickfunnels landing pages per month, and it also doesn't include some advanced functionality like email marketing or affiliate tracking.
The etison plan really includes everything - all of the clickfunnels features, and no limits on your monthly visitors or features.
I personally don't think you need the Etison plan until you're making some good money. Until then, the standard plan works just fine.
A lot of people ask about how clickfunnels compares to other landing page services like leadpages, unbounce, infusionsoft, etc.
I don't really think it's fair to compare them equally, since they all aim to achieve certain things better than the others. But I will say that if you're looking to build sales funnels, clickfunnels is hands down the best.
If you're JUST looking to build landing pages, then the others work well too. However...it's worth mentioning that clickfunnels is ALSO a truly amazing landing page builder, that's fast, and builds beautiful pages. So if the other functions are useful to you at all, I would highly recommend just going for clickfunnels.