well as far as feed back its going to be hard to give you an exact answer until you know what you max budget is and what you are looking to do with the computer, ie flat out speed or max storage, air cooled vs liquid cooled. as for tools usually just a Philips screw driver and maybe some zip ties
but here are some useful sites as far as far feed back on various thing computer related
http://anandtech.com/http://www.tomshardware.com/http://www.dslreports.com/http://www.guru3d.com/and of course there is the shopping
http://www.neweg.comand newegg forums
https://community.newegg.com/eggxpert/default.aspx