You can see the Pro benefits at https://www.geni.com/account_settings/premium_account (in my opinion the best view is the pop-up box of checkmarks when you click the link labeled "view all features"). In short, the benefits are:
Forest GEDCOM Exports
No Banner Ads
Unlimited Virtual Gifts
Expanded tree view (limit 5,000 profiles instead of 1,000)
Yes, but only a monthly or 2 monthly basis, when that returns. I like to do research in fits and starts, so I may do nothing for months, then do an intense month or Two. This means that I waste months of subscriptions when its on a yearly basis. My problem is not financial, but who wants to pay for water when your not at the trough.
Dedric Watson - Purchasing a Geni-Pro subscription does not provide you with any Data Bases - it allows you to do a limited amount on Geni that you cannot do with a Basic Membership - especially useful if you want to upload scads of Documents and Photos - but does not include any Data Base access.
A Data Subscription to MyHeritage combined with a Geni-Pro Membership does - but not sure the Geni-Pro Membership is needed at all for what you are looking for.
Or maybe I misunderstood - and doing research in a concentrated spurt, you want the Geni-Pro to allow you to enter that info and those Documents and etc on Geni, do all the merges you discover should be merged, and etc. with a few more options than a Basic Member has.
So this is a funny thread to see pop up again out of nowhere. :) Especially since I now have a Pro account!
Dedric Watson, Geni and MyHeritage have a partnership arrangement through which you can indeed get document matching, without having to upload anything manually. It requires paid memberships to both Geni and MyHeritage, but virtually everyone who has it loves it.
Since you indicated that finances aren't a concern for you, I'd strongly recommend at least looking into it. I've always been a heavy citer, but the Geni/MyHeritage Record Matching has improved my work tremendously. And it's pretty impressive to see the variety of record sets they have; they even give me Record Matches for my family in The Bahamas, which isn't exactly common elsewhere. :)