1st time user of Mac's. Just got a refurb mini 2.3 i5. Will be upgrading ram soon. Always been a Windows user. Just wanted to now should i do something i.e reformat hard drive with clean OS ? I didnt recieve any disks with it. Also what wireless keyboard/mouse do you recommend equivilent to magic mouse ? I need a monitor too. Thinking of Samsungs 19"-22" HDTV LED for about £120. Also any recommendations on a external DVD writer ?