I have a Hasselblad 500C, I shoot it 90% of the time. I absolutely love it. Best investment I've ever made. Most people shoot Hasselblad square, but I have a 645 back and mask. Also, best decision I ever made. I now have the option to shoot either 645 or square with just the change of the back and change of viewfinder, both of which just take 15 seconds to change. Also, I get 16 shots a roll rather than 12. Mine only cost $700 bucks with the full outfit, so it is affordable if you're looking to get into medium format. But, there are a ton of other options that you can go with for 645 if that's the look that you're going for.
One option is the Mamiya 645. You can find them for about $300, so it's way more affordable than the Hasselblad. Some are completely manual, but you can find others that either are autofocus/have a meter/etc. I don't have much experience with them, but everyone I know that has had one has been happy.
For square shooting you can also check out the Mamiya C330, Yashica Mat 124, or a Rolleiflex (tons of different TLRs and SLRs). Both the Mamiya C330 and Yashica Mat 124 (also different Yashicas you can check out) are TLRs, or Twin Lens Reflex. The C330 is a tank, but once again, everyone who I talked to loved it. Plus it's going to cost less than the Hasselblad. Great thing about the C330 is that it's one of the only TLRs where you have the option to change lenses. The Yashica Mat 124 is going to be a bit smaller than the C330, but it's a solid camera. My friend just got one and it is NICE. I want one wicked bad now. One of the best things about it is that it has a meter! Which is great if you don't know Sunny 16. (Look that up, it'll be your best friend if it already isn't). And two awesome things about both the C330 and the 124 is that they can both run 120 and 220 film. If you were to go with something like the Mamiya 645 or Hasselblad, you have to get separate backs for that. I have nooo experience with any Rolleiflex, so I won't even comment about it.
If you're going to keep this on a tripod at all times, you can check out a Mamiya RB67 or a RZ67. Now I said that the C330 is a tank, but these take the cake. They are HUGE! Both were primarily made to be used in the studio, which is why they are so massive. You have a lot of options with both, because they do have interchangeable backs, view finders, lenses, etc. And the biggest thing about these cameras is that they shoot 6x7, which is going to be the closest to large format you're going to get. So, even though they (should be) stuck to a tripod the entire time, you can still shoot landscape or portrait with just the flip of a back! Seriously, haha. The back rotates! That way you can shoot either way but still use the waist level view finder. It's really cool. One thing about the backs that I'm not sure of is that I know the RZ67 can take 6x6, 645, and 6x7 backs, which is really awesome. I'm assuming the RB67 can do the same. That gives you the same flexibility as the Hasselblad but at a much cheaper cost. You can pick up a RB67 for around $300.
And if you're now looking at 6x7s (love them!) you could check out the Pentax 67. It's an SLR, but it's huge. It's just a massive SLR, haha. Pretty cool looking, but going to hurt your neck after a while. Along with the TLRs I mentioned, this camera can shoot both 120 and 220 film. But, with a 6x7 format, you're only going to get about 9 or 10 shots out of the roll. Definitely something to think about. It also only runs around $500, which isn't bad. I don't have any experience or know of anyone who has experience with a Pentax 67, but I'll report back hopefully soon. This is going to be my best camera, haha!
Another option for 6x7 is the Mamiya 7. Amazing camera. Even though it shoots 6x7 it's much smaller compared to the Pentax 67. It is a Rangefinder, so gotta keep that in mind. Also keep in mind it's going to run you a few thousand dollars to pick one up. Hahaha.
So yeah, there's my rundown of medium format cameras I've had experience with! Hopefully it helps you a bit? I've shot 4x5, but no where near the same as Aneigma (sorry if I spell your name wrong), so I won't go over it. But, one thing, if you're looking to shoot stuff like Burtynsky, you're going to want a field camera rather than rail system. That's all!
But really, shoot medium format. It's so FUN!