you will need an aftermarket seat in that
L5740, the stock seat is not sized for a large man, is squeaky and plain unpleasant, bottoming out
on large bumps. I have a Michigan seat going in to replace mine. Really, the seat is no prize, JD is better here, but it's swappable so not a big deal to me. It's the stuff you can't change out, that you will enjoy/endure for all time that's more important.
As far as I know, no tractor mfg has a decent stereo from my observation. It's always
aftermarket, since few users want one. But I do, Kenwood plus Polk going in soon. Actually the best would be a set of headphones patched directly into the head unit. I'd spend money on a good noise cancelling headphone if heat isn't an issue; even with a/c they can get hot after a while. The 5740 is fairly quiet inside but quiet is relative, I still wear headphones at times when mowing.
The diesel fuel tank is way up top on the 5740 and hard to fill particularly if you have a loader. With just a mower, probably ok if you are strong.
Lastly, the 5740 with R4 tires is a hard ride, rough even after I took some air out of the rears. So if you can use other tractors in the dirt, then yes to turf tires, the ride improvement has to be significant.
Make sure you look at JD and Massey Ferguson alternatives; their cabs are nice too. If you can get an economy pto option, that would be super helpful for mowing.