Well the new ballasts are in and purring away... actually not so much as a purr, having the coils encased in that epoxy makes them virtually silentThe Advance ballasts seems to bring the bulbs up a bit faster than the Magnatek did, not 100% sure why, but I think the Advance's are a tad more efficient.
In any event she's now up to 1200w of pure saki coral growing power.
And as Dave mentioned, I haven't had a complaint with the Fulham ballasts, I've got a WH5 over our daughter's 10g nano powering a 96w quad power compact and she just cooks right along, instant startups and holds the output very steady.
I have an extra WH5 for backup, since they are rated at 128w max output, might do some playing around to see if I can get it to overdrive some NO T12's and T8's just for fun, and see if it will actually do it or if it will throttle itself back.