I've been all over the world and enjoy a very nice dining experience - and don't mind paying for it. But it sort of depends on what you are looking for in your 'dinner' experience. Just the steak and an amazing meal- I agree with Shula's - or STK in Disney Springs. But they are both chain steakhouses - very good, but an experience you can get elsewhere. But if you are looking for an amazing meal - can't go wrong.
My favorite experience is Narcoossees (but, alas, it's closed for a bit). Is it the best steak? It's very very good, but not the best on property (that's Shula's). However, nothing beats the entire evening enjoying the company of my favorite bartender while they hold a meal while we watch the fireworks. Same can be told for Cali Grill, or Citrico's (the fireworks are a bit of a walk to go see - so not during dinner). Jiko - I've never had a beef steak there - they have so many other wonderful things there (I actually haven't been there in a while - and it is going back on the list for the next trip now that I'm thinking of it).
Le Cellier is over rated. The steaks are good, but its just too much work these days to get in - and it's small, etc. Better experiences elsewhere. I also firmly believe in going for a nice meal means dressing the part - and it's hard to get dressed nicely and then go to Epcot.
Yachtsman is also good - but I've had hit or miss there, and there isn't the same special that the fireworks at MK bring - or the animals at AKL.
I have yet to have a steak at Steakhouse 71 - I'm not sure about it - I've eaten there for breakfast a couple of times and want to like it (the pictures going in are really fun) - but it wasn't amazing (for breakfast).
If looking for an amazing meal - Shula's or STK (Shula's gets my edge). If you have a car - you get validated valet parking at Shula's, ask at the check in desk - and this makes it much easier than STK. If you want a whole nice Disney experience...Cali Grill (with fireworks) or Citrico's and the fireworks gets my vote.