Easy to remember brand name, free from connotations and brandable to almost any business product or service.
The name "extex" has only five letters and only two syllables. Two-syllable names are exceptionally rare and exceptionally desirable. Established brands using two syllable names include Pepsi, Walmart and Gucci.
Extex.com is a .com domain. Dot com domains are the most prestigious top-level-domain in the world, famously used by websites like google.com. When most people think of a website, they think of a .com.