Thanks guys - I wish I only had 4 funds. Like a lot of people I have a bunch of old cat-and-dog investments. 10k in S&P 500 over here, 5k in small cap over there. Some taxable with gains, so no real incentive to sell and consolidate. And my current 401k vehicle, the government TSP, doesn't have a VTSAX equivalent, you basically have to split your money between a large cap and small cap fund.
The OCD part of me hates having the following lines in my asset allocation spreadsheet: small cap, large cap, us equities (both cap?)