Vern: The only downside of not reviewing the other offers for technical acceptability would be if one of those other offers disclosed information that would shed some doubt on the low offeror's promise. For instance, if the solicitation included detailed design specifications and there was some requirement to procure a subassembly from a directed source (such as on a source controlled drawing/spec) and that particular source was no longer in a position to provide that subassembly. The low offeror may have used prior quotes for the obsolete component as the basis for formulating its price without realizing that the component was obsolete, whereas other companies may have learned of the obsolescence and qualified their proposals on developing a new source/component. It may sound unlikely, but I've seen it happen.
But generally, and depending on what you are buying, I agree with Don and jtolli.