Which motor for genesis?

[jamespl]

I have 2 motors in mind for mh genesis, I currently have a 180a esc and stock 2075kv motor and running it on 4s but want to run it on 6s will either of these be motors be any good as I want a drop in upgrade and I don't know a lot about motor selection.

http://cgi.ebay.co.uk/Kd-36-74-12xl-1400kv-540-size-brushless-motor-74mmx36mm-/260659824041?pt=UK_ToysGames_RadioControlled_JN&hash=item3cb08945a9#ht_999wt_689

http://cgi.ebay.co.uk/KB-36-74-15xl-1100kv-540-size-brushless-motor-74mmx36mm-/250604787495?pt=UK_ToysGames_RadioControlled_JN&hash=item3a59359727#ht_1154wt_694

[forescott]

What about a castle 1520?? Great reliable low cost motor! Get one before they're gone!

[b.mcdaniel.2009]

Im running a Leopard 4082 1600kv motor with a ose mount. With 5s , turnigy 180amper and 48mm prop ran 58mph g.p.s.