Hello *A folks.

Normally I am a BA/OneWorld Flyer (as most business travel is to London and BA is the only direct flight from my home (Cape Town) to London.

*But*, because of BAs monopoly on the CPT-LHR route, costs are ridiculous, so I've started looking at alternative flight arrangements. I've found that I can regularly fly business on Emirates for the same (or cheaper!) than Premium Economy on BA.

So, my question: If I am flying regularly on EK from CPT-LON as well as flying regularly domestically in SA, am I better of signing up for the EK FF or SAA? Benefit of crediting my miles to SAA would be local lounge access, what would the benefits of allocating to Emirates directly instead?

For more background, the form questions:
(1) What is your home airport? (Cape Town)
(2) What types of fares do you usually buy ? (Premium Economy or Business)
(3) How many miles do you usually fly each year? (25k-50k (Earned ±50k avios last year)
(4) Do you have any kind of status at present? What is it? (BA Silver)
(5) What is most important to you in a FFP? (Frequent upgrades on travel, free lounge access)
(6) Which routes do you fly most often (Cape Town-London and Domestic South Africa)
(7) Preferred Airlines (Emirates)
(8) Do you travel for work or pleasure? (Both, most mileage is for business. Can chose to fly business if within budget).


Thanks in advance!

R