Nordic Marksman has everything that you are seeking. There is a good discussion thread on the Nordic Marksman forum about the Carbon-Fibre PRST Tripod versus the Shadow Tech (eg. HOG Saddle) branded Aluminum Slik Tripod. Bottom line is that the PRST at $500(+) is a better deal for price and features than the Manfrotto Carbon Fibre offerings. Tbe Aluminum Shadow Tech Tripod is half the price of the PRST and aside from the materials offers all of the same features including a large load rating.
The decision regarding a Ball-head versus a Direct-Mount, versus a Levelling Base is the biggest choice with the bradest selection that you must make regarding your set-up. Personally, I go with a Levelling Base beacause it does everything that a Ball-Head does, excepting extreme angle shots. You can still make those occasional high-angle shots by adjusting your Tripod lEGS. The Levelling Base gives you 15 degrees of cant, which is plenty for most situations. The primary sdvantage of the Levelling Base over a Ball Head is stability of the rifle and better control over adjustments. But that's just me, and for every fan of Levelling Bases there are a dozen fans of Ball Heads. Or Direct Mounts. Each approach has advantages and disadvantages.
Your best bet aside from an expensive "Buy and Try" of each system, is to spectate a PRS-style match like the "Got Your Six" PTSD Charity Shoot at CHAS Gennessee Range near Edmonton this coming summer. There you can see competitors actually running the various systems and most are only too happy to discuss their choices and why. Attendance at a match also gives you a chance to rub shoulders with other shooters to discuss calibres, actions, stocks, optics, bipods, Kestrels, Ballistic Computers, and everything else under the sun. Most competitors will happily do a show and tell on their rigs and support equipment during down-time, and will even let you rtake a comparative look through their optics to give you a better idea of what is out there and what people are actually using. You can learn a great deal just watching and listening to the many conversations.
Just some food for thought. I shoot off a tripod because I am in a wheelchair and the system works for me. As an able-bodied shooter YMMV of course, but for long-range hunting they are just the ticket offering vastly-improved stability over other aides such as shooting sticks.