Ok, now I'm back to deciding between these options:

1) 12-30T Cassette, keep 36T chainring
2) 12-28T Cassette, replace with 34T chainring

Interestingly, they both yield the same exact gear ratio change. Any preference on one or the other? The 30T Harris cassette weighs 70% more than the 28T Ultegra cassette, but is half the price.