I would recommend using a backer of mono first. Spool on some mono, and then tie the braid to it and spool it on as well. If you spool braid straight on the real first, it will slip. Braid-wise, I prefer Fireline. I don’t fish alot of heavy cover, so 6-8 lb test suits me fine. These guys and their 60 lb rope just blows my mind. I can understand bringing fish out of cover, but 60 lb for a 3 lb bass? Remember lighter line is more sensitive. But i guess it depends on the quality of rod you are using also. Fireline has a breaking-in period. It will sound like it is grinding on your guides. Once it is broke it, hang on.
I haven’t had any problems just putting braid straight onto a baitcaster. I choose to go with 30, or 50 lb. Power Pro. it has the diameter of 10, and 8 lb mono. I prefer it for soft plastics, and topwater. It has almost no stretch at all. Used it for the first time a year or so ago. actually it wasn’t nearly as bad as a thought it would be. No worse backlashes than you get with bad mono cast.
I would use a backer of mono then put your braid on choose what you are comfortable using in lb test. I only use braid for frogs and flipping/pitching and I have no problems with 65 lb and our water is very clear and I have snatched 1/2 lb rockbass out from under pontoons. Just use what you are confident in.
I fish a lot of milfoil, so i usasually fish 55 lb. sufix on a seven foot Quantum rod. Just ask yourself what am I going to be fishing? The baits i use are Yamamoto Kreatures with a pegged 1/2 wieght, I also flip Berkley Power Bait Beasts with Mustad Ultra Bite Hooks.