Short Power Cable (ie, 3 to 6ft)

I am planning to buy two Rowland mono blocks (model 6) to go with my Avalon Eclipse. This will allow me to put the mono blocks close to the speakers and hence it will be possible to use very short speaker cables. Is it advisable? say 3 ft!!

Any suggestion on the cables? (ie, MIT ?)

Your advise would be much appreciated.