In that case, I'd recommend that you and your spouse each get the CIBC infinite privilege (TD is basically the same but CIBC has double the sign up bonus now). It gives you the AC benefits you want for $399/year but only for the primary cardholder. So, instead of paying $99 for a supplemental card, you could pay an extra $300 and each get a primary and each get the 50,000 sign up bonus. The priority boarding and lounge access are probably worth that if you travel a fair bit. (p.s. the Visa infinite hotel benefits are a nice bonus).

For an extra boost to your aeroplan accounts, you could also each get an Amex gold rewards card. They are free to try for the first year and offer a 25,000 sign-up bonus (once you spend $1500 in 3 months). Cancel before the year is up and keep the bonus. It's true that Amex isn't accepted everywhere, so this would be a good way to try it out. Plus it earns double points at gas, grocery and drug stores and for travel purchases, which is better than TD/CIBC in these categories.