I'd get more of those pretty blues, just in case you want to run something with monster-sized stacks (T1000, T5000, T25K).
By my calculations, you need 410 chips minimum (10 players max at T10K or T30K), 640 chips (T10K/T30K up to 20 players), 780 chips (T10K/T30K for 20 plus T300K for 10), or 980 chips (20 players up to T300K). Since it's your money, I'd go full-monty:
160 x T25
160 x T100
100 x T500
200 x T1000
160 x T5000
200 x T25000
20 x Bounty
-----
1000 chips.... plus extras/samples.
10 x T10K stacks: 12/12/5/6/B = 36 chips
20 x T10K stacks: 8/8/4/7/B = 28 chips
10 x T30K stacks: 12/12/5/6/4/B = 40 chips
20 x T30K stacks: 8/8/4/7/4/B = 32 chips
10 x T300K stacks: 15/12/9/B = 37 chips
20 x T300K stacks: 10/8/10/B = 29 chips
Customs are a once-in-a-lifetime expense. Spread over the life of the chip set, the cost is quite small.... and history has repeatedly shown the wisdom of getting all (or more than) you need initially up front. Chips that match exactly may not be available later (if at all). If you can't afford it, wait until you can, or otherwise find a way to make it happen.