Ditto. Is there an echo?
Shoot for under 0.5%, since you can get most flavors of international investments for somewhere in the 0.2-0.5% ER range. Maybe go a little higher if you are constrained on the ability to invest in international elsewhere. 1.5% for international vs. 0.1% for SP500 would probably make me be 100% SP500 if those were my only choices since I doubt I could beat the 1.4% expense drag by diversification/rebalancing/risk reduction in international.
I'm stuck with virtually this same choice in my HSA - 1.5% for anything besides SP500, and 0.4% for the SP500 index fund. So I'm 100% SP500 in the HSA, and get my international, small cap, etc. elsewhere in IRA, 401k, taxable, etc.