Setting up wife's new 401k. Lots of good Vanguard funds. The rest are not so good. The only int'l option has a 0.80 ER, so I'm going to stick with US stocks and bonds. VBTLX is what I'm going with for bonds. My question is on stocks. My options are 1) straight VFIAX, or 2) VFIAX/VIMAX/VSMAX. Which would be the better choice? I'm leaning towards the latter, however if I do, what % of each would weight it properly?