I know there are many threads relating to a muffler delete.
I just wanted to hear everyone's 2 cents regarding the delete. I have a '17 IS300 and would love to open it up without breaking the bank.
I'm concerned about the drone due to highway driving and taking away the cars "class".

 

You'll find quite a few 2¢ in here:

https://www.clublexus.com/forums/performance-251/

 

I had my muffler deleted within the first or so week of owning my 2015 IS250 and I have to say that it's not a bad start.
As for drone, I listen to music while driving so the sound of my exhaust isn't always on my mind. It'll start to get loud around 2-3k RPM, but when you cruise around town or you use cruise control on the highway, it isn't going to be particularly annoying.

As for your ruining the car's class; I really didn't take that into account when I had gotten my mufflers removed, but it still upholds its general image. It's just that now it looks nice and sounds nice.

 

You will drone. I drone alot. Your passengers in the back seats will definitely hear it. Whenever I'm on the phone, people on the other end will hear my drone too. Adding my midpipe made me drone even more. It might not grow on you, nor your passengers.
Cabin drone is more obnoxious in the lower rpm range like 1200-2500 range

 

I wouldn't. Just save for a catback and do it right.