I love the simplistic 400-chip T500-base tournament set. All you need is a single rack of each denomination per table (so 400 chips for 10 players, 800 chips for 20, etc.), and it gets lots of those (usually) gorgeous upper denomination chips in play:
10 x T500
10 x T1000
7 x T5000
10 x T25000
------------
37 chips = T300K stacks
The extra 30 x T5000 chips color-up the T500/T1000 chips with perfect efficiency.
You can also withhold 4x T25K chips (10/10/7/6) to create smaller T200K starting stacks, allowing up to five re-buys with the extra 40x T25Ks. With 500/1000 opening blinds, it's 300bb to start or 200bb with re-buys. A single-table 300K event has three million chips in play.
Of course, starting stacks can always be smaller if desired (10/10/7 is just T50K), or anything between 50K and 300K stacks. It's a very versatile set, and it's generally pretty easy to top off existing larger T25-base sets by adding a few extra T5000s and T25Ks to gain the high-denom tourney option.
Below is a great blind schedule for T500-base sets, with blind increases mostly ranging between 33%-50%, averaging 39% overall.
It can be used for anything from a ten-player 2.5-hour T50K turbo (15-min levels) to a four-table 10-hour T300K marathon (30-min levels) and everything in-between -- simply by custom-tailoring the starting stack sizes, number of players, and blind level times to generate the desired length and style of event:
lvl sb bb
L1 500 1000
L2 500 1500
L3 1000 2000
L4 1500 3000
remove T500 chips
L5 2000 4000
L6 3000 6000
(optional end re-buys, 50bb)
L7 4000 8000
L8 6000 12000
L9 8000 16000
remove T1000 chips
(optional end re-buys, 19bb)
L10 10000 20000
L11 15000 30000
L12 20000 40000
L13 25000 50000 ** EOT 10x100K
L14 35000 70000 ** EOT 10x150K
remove T5000 chips (optional - requires 5x T100K chips or 20x T25K chips)
L15 50000 100000 ** EOT 10x200K (or 20xT100K)
L16 75000 150000 ** EOT 10x300K
L17 100000 200000 ** EOT 20x200K
L18 150000 300000 ** EOT 20x300K
L19 200000 400000 ** EOT 40x200K
L20 250000 500000 ** EOT 40x300K
L21 350000 700000
remove T25000 chips (requires 25x T100k chips)
L22 500000 1000000
L23 750000 1500000