Dangerous territory you're about to tread.
"Worth it" is such a relative and objective question, it's going to be different for different people. For me, I spent years slowly upgrading before I reached a point when I could first afford to buy my first high end reel. After that, all bets were off... I just found ways to buy sweet gear. If you're an enthusiast like me, and enjoy the gear as much as the fishing, a top end reel is absolutely worth it. I love fishing my Mets, Aldebarans, supertuned Chronarchs, Steezes, and more exotic reels like Exsence DC's and Conquests. I still use Curados, Citicas, Pro G's, Tatulas, and such... but they're more the reels I take out when I know conditions are going to be nasty or if I'm wading or something.
I'm not a super competitive fisherman (other than just with my buddies), so I'm more interested in fun than value or function. To me, I just enjoy fishing higher end reels more. I'm on the water for relaxation and fun. My top end stuff is just... fun. That's why I buy it. That being said... will I catch more fish because of them? I'd say hardly ever, if at all. I can cast a tad bit farther with my MGL than I can my Citica E's, but hey... I could put the boat a little closer in almost every case.
To your question of whether or not they're more durable, I'd say no, not really. I take really good care of my stuff, and buy almost all Shimano and Daiwa with some 1,.3 Fishing. and Lew's sprinkled in here and there. I wouldn't say my 3 year old Metaniums have worn any better or worse than my 10 year old Curados, but the Mets are tighter and smoother... and they always were. If you take care of Shimano and Daiwa reels, they just last.
Would I buy again? Yep. Good reels from reliable manufacturers hold their value if you take care of them. They're an investment like good Dewalt, Bosch, Milwaukee tools ect... I can turn around and sell my Chronarch D7's for what I paid for them ten years ago. The same can be said of almost all of those older Shimano and Daiwa reels.
Okay, so after all that... my recommendation.
1. Don't do it unless you're prepared to buy more down the road. You'll want to.
2. Go Shimano or Daiwa.
3. If you're looking for a great all purpose, I think there's a ton of value in something like a used '13 Met. You can find one for under $275 for sure, and they're pretty much the perfect reel in my opinion. I like the MGL a tiny bit better, but it's also going to cost you $50-$100 more. Other options would be an Aldabaran or Steez, just depending on what you're throwing with it.
Congrats on the bonus and have fun!