I would use the full mirror. I can picture your kids being teens (if girls) and having a sleep-over where three girls could get ready with a full mirror. Though my son as a teen could spend a lot of time fussing with his hair, so maybe it's not so gender-specific. Pottery Barn has large framed mirrors like the one in your first photo for a few hundred dollars. I know they have 60", not sure about larger. But I'd get a frameless beveled mirror from a glass shop. They can cut holes to mount sconces, and I think it's a good idea to use three because you have a wide space between sinks with that style vanity. You might consider bar style sconces so that you can put them on both ends and in the middle. They're 4-5" wide and won't impede the view of someone at the sink. Side sconces provide the best lighting--no shadows fall on the face from overhead lights. Mounting lights on the mirror will also bounce the light, nice to have in a windowless room. A new look for full-length mirrors is a short mirror about 30-32" high, framed or unframed. I love this look for a long vanity. Less mirror, less cost from the glass shop!

We recently bought a 15 yr old custom home (2300 sq ft, 3 bd, 1.5 ba). On the bedroom floor (lower floor, on slab) there is a space a little over 20' by 6.5' for bathrooms, laundry, utility. There's nothing structural in the space, but there are not many options for expansion except into the master walk in closet. We think they were probably getting to the end of the budget and just decided to do one larger common bathroom and a smaller laundry/utility room. The result is no master bathroom, but laundry has to be accessed through the master walk in closet. We'd like to reconfigure the space into 2 smaller bathrooms and move the laundry into the new common bathroom. Our plan is to clear the existing bathroom out and move the existing dividing wall over. A small utility room would be created by adding a wall and pocket door in front of the remaining hot water tank and electrical panel (local code allows this as long as it's a dedicated space with a separating door and proper clearances). The new small master seems straightforward, but accessing the shower in the common bathroom may be tight. Any thoughts/recommendations on my current layout are welcome. Current layout: Proposed:

Yes, you can do that. The bath bar style is fine but if you choose a vanity light, a two-light fixture is better with a 60" vanity. A four-light fixture is enough light if you want to use just one light above the mirror.

Your bathroom already looks really big to me, lol, so I don't see a problem with potentially reducing the visual space, if you decide to go with 2 mirrors. My personal bias, though, just so ya know: My husband and I bought a tract house nearly 3 years ago, and couldn't wait to remove the builder's huge mirror over our master vanity. :-D Our bathroom isn't small, and I don't really miss the lost mirror reflection in between the 2 separate mirrors we have now. I will admit that, once in awhile, while brushing my hair, I look up to find that I'm standing in front of a wall instead of the mirror, lol, but then I realize, "Dude, what do I need to watch myself brush my hair for???" I could just relocate my brush to the *other* drawer on the other side of my sink, and solve my problem (doesn't look like an option for y'all, though....), but the baby likes to empty the other drawer, so I don't bother keeping anything in it for now. I guess, all of that to say, think about how you use the space, and whether or not you think it would bother you to high Heaven if you were standing outside of the mirror's reflection after retrieving something from a drawer. I freely admit that I don't think twice about compromising a bit on function if aesthetics are compelling enough. ;-)