What's the weakest link in my stereo set up? I live in a townhome, so limited on space.

then this might be your best friend.  Endorsed by Streophile.  I had a pair for my 3rd system.

https://www.ebay.com/itm/135529601252?_skw=nht+sb3&itmmeta=01JMSWYN7DWW2MBVDDZTRNTXXH&hash=item1f8e3198e4:g:rjIAAOSwLiJnnu4W&itmprp=enc%3AAQAKAAAA4FkggFvd1GGDu0w3yXCmi1c%2BCVdmz5HR8x94GAOfgb2m0iZPN2dQbgMxtZqoMPQfRUx7U%2Frga2t1%2B%2B1t5W56GPA6Ka%2FksNUPm3BAhZoiEoI3OXAfUb%2Fj2FDQD5goXodv2T0UzYp4zeRIJrIYr1KYUE9hqgU2EuxdBo%2BSmuwjgtcshth4--ReqSSg%2FXUONllWlublwRtEzPGZZ0PXE07T4tQvtWwxzQ6kpKVRceHorvrE9xH4tJOcqUwab0nmCbC7qBT0TmclztvGcd7JnkmVLiixyb5bcgYkvggoGwxLYod1%7Ctkp%3ABk9SR_LT-rymZQ

This is a loaded question. What is the problem you are trying to solve for?

What are you lacking? What are you missing? What can you get away with?

Honestly, with your current setup, the only thing you are really missing is lower bass. Not sure what kind of music you listen to, but there is a lot of stuff in the under 60hz range. Adding a sub will make your system fuller, richer, and sound bigger than what it is. Taking some bass out of your speakers, might also clean up the midrange, just make everything sound better. 

Once you have a "full range" setup, do other upgrades from there. IMHO. none of it means all that much if you don't have a full range setup. 

Next up is sound treatments, but wife approved!

Rugs, house plants, canvas wall art (stuff the backs with insulation)pillows, etc..

Photos of the room and furniture arrangement please

@vrikkian

What do you wish to improve upon? And what kind of budget will she give you? Not counting putting a carpet on the floor. 😉😉

While figuring out a new furniture setup to get larger speakers in your space, start auditioning some interesting finds, not to buy but to refine your preferences, listening to your Focals all the time.

Facebook Marketplace, this is speakers for sale, 100 mile radius of Baltimore, $200 to $2,100.

https://www.facebook.com/marketplace/baltimore/search?minPrice=200&maxPrice=2100&query=speakers%20for%20sale&exact=false

Don’t mistake loud volume with full range when you see large drivers.

Perhaps below are too big, but for example: I am a big fan of level controls to adjust tweeters and midrange driver levels relative to their forward firing woofer, in your space, to your and your wife’s ears, with a SPL Meter and Test Tones (no ports or like these front ports only), on stands that are slanted and toe-in away from side walls.

https://www.facebook.com/marketplace/item/560961356962901/?ref=category_feed&referral_code=null&referral_story_type=listing&tracking=%7B%22qid%22%3A%22-308827868666038385%22%2C%22mf_story_key%22%3A%2224106793762242254%22%2C%22commerce_rank_obj%22%3A%22%7B%5C%22target_id%5C%22%3A24106793762242254%2C%5C%22target_type%5C%22%3A0%2C%5C%22primary_position%5C%22%3A5%2C%5C%22ranking_signature%5C%22%3A1926822584997181617%2C%5C%22commerce_channel%5C%22%3A504%2C%5C%22value%5C%22%3A0.00013336701654066%2C%5C%22candidate_retrieval_source_map%5C%22%3A%7B%5C%2224106793762242254%5C%22%3A3003%7D%7D%22%7D

btw, after you finish chasing very low bass, especially in a space like yours, you realize it can be fun mud, I have my rear ports plugged in my current space, there was no wall behind them in prior space.