mcintosh 452 amp

hi audiogoners. i just purchased a mcintosh 452 power amp locally (traded in a b.a.t. vk250 power amp). my question is this: i'm pairing the mac with a b.a.t vk3i tube preamp. does this combination work well? would it be worth, down the line, to invest in a mac pre amp? my system so far is as follows: kef 205/2 speakers, marantz reference cd/sacd player, vpi turntable, purist audio spkr cables, jps labs interconnects and powerchords, and a running springs power conditioner. that being said, i think i've pretty much completed my system. hopefully the mac amp is the last piece of the puzzle. any feedback would be appreciated. thanks.