Kind've a waste to buy 4x 6.5" coaxials... Last I saw, they were ~$130 a pair on eBay...
For that type of money, you might as well ditch the whole idea of "cheap" coaxials and splurge for the Ascendant Audio Arco component setup. At $199 on pre-order, these will destroy both sets of crap coaxials you posted about in terms of sound quality, imaging, tonality...