Audax rides

Advanced apo-logie's for hitching a ride & poss gonna get some stick, but can't post whilst in the nursery... so sorry & what the heck!
Whilst looking for a comfortable all-season distance/light-touring upgrade to my current modified, capable, but inadequate 8 speed Revolution Courier, I was looking towards purchasing an £850 Ribble Audax or Verenti Kilmeston on credit.

  That said, I’ve now acquired a very nice used 2009 Thorn Audax frame & as a novice builder & minimum wage care-home worker, I’d very much appreciate your advice with regard to mixing, matching & purchasing a decent set of components that will do both myself & the frame justice within my remaining £650 budget. 

Please note; I'm looking for a compact/triple chainset & the rear stays have been cold set at 135mm. So whilst I’d like to purchase off-the-shelf wheels, I may nonetheless need to consider a hand-built rear.

Many thanks, Chris.