i wouldnt, Id spend the extra and get better.(tho mine are worth 750 so maybe not that much!) The wattage doesnt mean much until youre competing with them, esp with a company like vibe, they will have spend effort getting the wattage up to look impressive and compromised on speaker quality
Like my old JLs sounded gorgeousand were only 65rms - but expensve kit with good SQ. My new ones are 300 rms - but i wont need to be running them at that
also wouldnt trust coaxials that cheap either