Motor and esc: im still abit confused

[danny the elfman]

Hello, im still abit confused with what sensored motor and esc to get for my mad monkey. I dont know whats good and whats bad. Should i go for a combo, or buy them seperatly? Is this any good http://www.modelsport.co.uk/lrp%20br...products/31080 ? And this http://www.ebay.co.uk/itm/ORCA-Brush...-/400205341099 ? Or can someone suggest a motor and esc that work well together. Lowest 8.5t. Thanks for reading.