Need a convertible that's easy to install in taxis next to a RFing True Fit

[GoGoGirl]

Please help me, oh wise mamas!  I’m about to have baby #2 and we’re trying to decide which convertible car seat to buy for her/him. 

We’re a car-less family in a big city, so we take taxis or rent a zip car whenever we go somewhere by car.  That means we’ll need a car seat that fits in a variety of cars, and is easy /quick to install.  Lightweight would be nice too, since sometimes I’ll be carrying two kids and two car seats to a car by myself (any tips on how to manage that?  I’m scared!). 

DD is still rear facing in her First Years True Fit, so the new car seat would need to fit next to a RFing True Fit (in a variety of cars).  Budget isn’t a huge concern.  We might borrow a good friend’s baby bucket seat (so I know its history and that is hasn’t been in a crash) for the first few months, so the new seat might not need to work well with a tiny newborn. 

I really appreciate any help!  I’m so lost!

[Eresh]

Maybe a britax roundabout? The TF is pretty wide and I don't know what would really puzzle well, but the britax seats are super easy to install. The roundabout is probably the lightest and smallest britax so easiest to cart around, though it wouldn't last as long shell height or weight wise as a marathon.

A scenera is easily the lightest and it narrow but it can be a challenge to install rfing, especially with the right angle.

I don't know the age/size of your oldest (I'm on tapatalk) but if she is forward facing have you thought about getting a maestro and handing down the true fit? The maestro is light and easy to install. Downside is the cupholders may not puzzle well with the TF.

ETA: well I somehow missed your dd was still RFing. Well maybe the bucket seat will take you to her FFing? I'd imagine the bucket seat would probably be pretty convenient to install baseless next to the TF.

[MacKinnon]

The Roundabout isn't going to puzzle well with a TrueFit, I suspect. I would look at narrow, low seats like a Radian or a Complete Air. The Radian, of course, is not an easy install, but it is narrow and will always fit for a side by side install, assuming you CAN install it! You'll want low though, to go under the edge of the True Fit, something like a MyRide up on a base will probably hit the side of the True Fit and you'll have trouble!

[Eresh]

I have a complete air 50. It's a very light and somewhat narrow seat with a low base. It has a tall shell though and has to be installed at 45 degrees according to the manual so it can have fit issues in some cars. It also doesn't fit infants well so you'd need to use a bucket for a few months first. If you do go with a CA you'll probably want the one with the base as the one without can require multiple noodles to get the correct incline.

[MacKinnon]

Hmm... As I'm thinking about it, with two in the city, and the need to have both kids and both car seats... I would maybe go with a narrow, higher weight infant seat. Like the Chicco Keyfit 30 or the Safety First OnBoard. I was able to puzzle my Keyfit next to/under the lip of the Marathon my DS is in (FFing though, so that might be an issue). Then when you get out, you could snap the Keyfit into a stroller and only have the toddler and the other car seat to manage, maybe a double stroller and the TrueFit on a cart sort of thing? Or, the TrueFit with the head restraint off could be for baby and you could get DD a new seat?
The recline for the CA would be less of an issue, if you went that way?

Another option would be the Combi Coccoro with a Flash stroller frame. You would get more life out of the seat than a carrier, and have the option to put it in a stroller, eliminating the need to carry two seats. Now that I think about it, this is likely what I would do. It's a narrow seat, good for three across.

[jocelyndale]

I'm not much use for recommending seats, but carrying two isn't that big of a deal.  Wear baby, hold your eldest's hand.  Use a folding luggage cart and put one seat on it right side up, then the next seat upside down.  They'll fit together well.  Lash 'em down, put your bag over the handle and pull with your free hand.

Or if you have a bucket:

Put oldest's convertible on the rolling cart, strap kiddo in.  Carry baby in bucket.