Consider Boulder, CO...but consider also what a previous poster
said, e.g., the not-nearly-as-rosy-as-it-once-was future of software
development in the USA.

In general, if you plan (or hope) to live (or move) somewhere for
lifestyle reasons, you'd be wise to develop a flexible career
strategy that doesn't depend on one industry, even one as broad as
software engineering. That, and avoid a lifestyle where you _must_
have a really good-paying job. If you want to make something like
whitewater paddling a priority in your life, something has to give
(unless you're a trust fund kid). Fewer sushi dinners, an older
car, doing without some of the expensive electronic toys that
festoon the average American household, thinking long and hard
whether you really need something before you buy it...these are the
kind of habits the non-independely wealthy need to cultivate in
order to be able to make certain choices.

--
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Mary Malmros
Some days you're the windshield,
Other days you're the bug.