Think about how much weight each of the drawers will potentially hold. If the tools are not too heavy than pretty much any box will do; but, if there will be many tools in each drawer than seriously consider a box with ball bearing slides. All of the "top-end" boxes have ball bearings, really nice, but more expensive.

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1992 500SEL 25K
1995 E320 40K
1995 SL600 120K
2002 JX8 Sport 43K
2005 Volvo S40 95K
2006 Isuzu NPR 304K (Frankencamper)
2007 Crown Victoria 150K
2014 Smart Electric 20K