if you friend doesn't plan to upgrade later on, you could get away with 4 gauge amp kit, or piece together what you need. i would check on wire from cadence, just look it up on ebay. i recently picked up some wiring from this ebay seller, http://myworld.ebay.com/audiosavings/?_trksid=p4340.l2559. depending on how many amps you will be running. (single 5 channel, two 2 channels, etc) -for example, 4 gauge kit w/ distro's and some 8 guage. , if you run multiple amps you would still need another set of rca's and speaker wire. -monoprice.com is great, http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10239&cs_id=1023903&p_id=2749&seq=1&format=2 http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021814&p_id=2866&seq=1&format=2 for amps, my dad recently picked up a 2 channel aura sound amp from partsexpress. veryyyy good quality amp here. 2 options here: the first is to just get a single 5 channel amp, bridge the components to the first 4 channels (150rms x 2) and get a dual 4 ohm DCON for a 2ohm load on the 5th channel (200wrms). this option would be the cheapest, and require a cheaper, single amp, wiring kit. http://www.parts-express.com/pe/showdetl.cfm?Partnumber=269-191 second option: 2 amps. if you noticed, two 2 channel amps are offered. considering how little price difference there is between models, i would get (2) of the rpm 2300's which would give you 150x2 for the components and 450 x 1 @ 4ohms to the sub. In this case you would order the single 4ohm DCON! http://www.parts-express.com/wizards/searchResults.cfm?searchFilter=NEW_AURA_OCT11&srchExt=&perPage=25&sortBy=1&layout=list&page=1&srchPrice=&srchCat=15&srchMfg=&srchPromo=&srchAttr=