I'm not really a car guy
I'm looking to purchase a new SUV. I've visited both my local Acura and Lexus dealership in Mississauga, ON and have been given decent quotes.
Also, considering leasing (and potentially buying vehicle after lease) v. financing....
I am looking to keep this car long term
K, so,
1) None of those are "SUVs". They are crossovers, or "CUVs" if you will (Crossover Utility Vehicles). You're new, so we'll forgive the error
2) If you're interested in keeping the car long-term, then why would you consider leasing and then buying it out afterwards? There are added costs involved, and the lease payments will be higher than if you simply finance it out. The benefits of a lease are that at the end of the term, you can simply hand the car back (assuming no issues of excessive wear and tear/damage and within your mileage limit/allocation) and be done with it. The downside is mainly that you don't technically "own" the car, such that you are limited on your mileage allowance, and you must repair any significant damage (normal wear and tear is fine - but a cracked fender, for example, you would have to repair even if you're OK with how it looks while driving it).
The RDX has become something of a "value" proposition in this class. It's simply not class-leading in any real way, other than having a V6 over a turbocharged 4-cylinder engine. V6s are smoother, typically, but they make their torque much higher in the rev range (i.e. when the engine is spinning faster). The RDX does the 0-60 sprint in 6.2s, whereas the NX does it in 6.9s - so, yes, the RDX is faster in that regard.
Let's be honest here...both are plenty powerful, neither will be hella fuel efficient (the turbo-4 could be good if you drive it lightly, but it's impossible to know which "will use less fuel" for your purposes), the Lexus will be more luxurious, both will hold up well in terms of reliability if you maintain them properly.
Nope. But it does have a turbo. And we know how reliable turbos are long term.
Stop being full of
...come on - this isn't the '80s, turbo 4s (inline or "I-4" - not a "V4!") are plenty reliable long-term if properly maintained - not a different story from anything that requires proper maintenance.
SK, the big take-home for you is to figure out your "needs" (as opposed to your "wants"), test drive the cars in the trims you would like to buy (i.e. don't test-drive an NX300h (hybrid) if you are going to buy the 300t (turbo), look for different wheel sizes or "sport suspension" since those will change how the ride/handling/comfort will be in the car you end up getting), and go for the one that makes the most sense for you.
If you are hauling large goods all the time, check the cargo space between them (especially if you're considering a BMW X1 or the like). Comments re the stroller are true - but I don't suspect you'll find either the RDX or the NX "too small".
If you use the rear seats a lot, sit in them for a bit and see if they're comfortable. Look for hidden features that you are likely to use daily (or their absence).
Good luck!