(1) new home - LHR
(2) 2012 mileage - 100K
(3) Economy fare
(4) Work travel, can choose airline
(5) 2012 expected R/T destinations: AMS (6x), YVR(4x), YYZ(4x), IAD(3x), RTM(3x), ZHR(3x), HEL(2x), HKG(1x), LAS(1x) -- some domestic travel once I'm in Canada, USA, NL, and FI
(6) current status: UA Gold (37,9 on UA), BA Bronze (13,7)
(7) MOST IMPORTANT: upgrades on travel and free lounge access

I realise I've made the mistake of not consolidating my air miles in the past - ready to be loyal to one airline, but not sure which. Thinking BA since I'm flying out of LHR...? Would it be worth shifting from * to OW?

So grateful for this forum! Thanks in advance