Have the opportunity to buy older Cigarette with 525sc's. Less than 300 hrs on both. Don't know anything about them. Any help/info would be appreciated. Huber trans. with TRS drives. Reliable package? HP?

I believe they were a bone stock merc 420HP 454, with a 174 B&M blower mounted on them. Decent setup and ran ok, but can be much improved on with modern parts. Huber made a good transmission. TRS drives ok on a top gun with that power, maybe a little more, but not much more than 575-600hp. At 300 hours on those engines, I'd consider a rebuild in the near future.

177 blower and lower compretion. GlassDave had a pair in a 38 donzi and they were pretty bulletproof if I remember right.

That would be a merc 525sc. Hawk 525's are 420's with a b&m 174. I talked to bud lorrow about them one time when I was at the cig factory.
The pair I had were gen 5 454's 088 heads, crane rockers, 2399 speed pro pistons, 7/16 rods, 174 blower with a Holley 9022 carb.
The merc 525 was 7.5:1 with the 177 blower

Have had 0 issues with my hawk 525s. Someone put B&M 250's & Dom 1050's on them before i purchased boat. This season i think i am going to switch to roller cam setup since i have them out of the boat for transom repair.

I did it on merc 525SC but it was due for a top end refresh. Keep in mind that it will run almost 3k per engine to do right. If you're gonna spend 2k on cam, lifters, springs, locks, retainers, timing set you might as well do complete top end refreshes with valve jobs and head gaskets and new head bolts. That 3k is not including assembly.

If they are do for top ends or soon will be, then I'd say swap to a roller set up. If not, I'd leave them alone. I picked up about 150rpms at WOT and better midrange accelleration.