i bought two pairs of the billet cans on e-bay a while back for $35 each, and then stuffed them with alpine spr-174a's, they sound killer, you could get the sps-174' for about $45 a pair on e-bay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3088668447&category=32 819they dont handle as much power, but they still sound way good, then hook them up to a mrp f240 foraround $120
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3088907807&category=39 740 we use these at work alot, they sound way killer for the price, you could pull it all off for around 5 bills, which isnt bad. those ebay ads are just for example.