I have the last two, in addition to a lot of other cards.

Some advice - don't just rush out to get a card. Spend some time reading the various forums here (especially the BA and credit card forums) to get a feel for what's possible.

Other random thoughts:

1. I think you might have skipped over it but it bears further examination. BA will allow you to set up a Housahold Account. With this arrangement, up to 6 people may pool their miles. The miles may only be spent on members of the HA.

2. It might seem strange, but disabuse yourself of the notion that a credit card is ... a credit card! Over here, a credit card is a tool for gathering milkes/points. Accordingly, if I were you, my plan would to be to set up a household account (see the BA forum for details and restrictions) and then have all six members of the account apply for the card (with the 25,000 mile bonus). Bingo - an immediate 150K miles. Then put the cards in a drawer.

3. If you carry balances on your credit card, do not even consider a co-branded card - the interest rate will negate any miles/points you might earn. Get one with the lowest interest rate you can find, or at least cash back, and use that as your 'credit card'.

4. Another benefit of BA - award flights may be changed (dates and times and sometimes even city pairs) at (usually) no charge. Huge advantage compared with most other airline FF programs.

Trust me, I've been where you are. Plan on spending a lot of time reading the various forums on FT until it all starts to soak in. This is the part that tends to eliminate the folks who think it's a snap to just get a credit card and next week they'll be flying First Class to Tahiti. Not gonna happen. It's a lot of work, but it's the most enjoyable work I'ver ever done. And the payback can be tremendous!