If putting heavy braid on a multi, I'd avoid anything with a plastic spool (so Sloshes etc.) as there's a real risk they'll go bang under the pressure. As said above, the new 525's have real issues these days with poor manufacturing - the earlier ones weren't quite so bad.
The metal-spooled Sloshes (SHVs SHAs) have real issues with shafts bending under pressure - I had six of them and got rid of them all due to this problem recurring - otherwise they would have been really nice reels.
As said above, my choice would be the Saltist - way better than any of the others and you should be able to pick up a second hand one for the price of a new 525mag. I'm not sure of the diameter of 100lb or so braid but suspect it's about the same as 15lb or so mono (0.35mm) in which case I reckon the 20 size would be best - casting 0.35 on the larger 30 might be an issue unless you really underfill the spool, which will cause you to lose a fair bit of speed on the retrieve.
Gary