Ok where to start... I say the Grand Cherokee would be the best choice
As for Jeeps being garbage. While they do have issues, just as any vehicle including Land Rovers, the issues they do have are usually easy and cheap to repair....unlike a Land Rover, which happens to British not American. Didn't you say "Don't Even Recommend a Foreign Vehicle"? Also Check out the prices for said Land Rovers.
Ok I am going to post a few links and then give my .02 worth of advice.
http://www.autotrader.com/fyc/searchresults.jsp?position=top&position=top&systime=&doors=&model=TRAILBLZ&search_lang=en&start_year=1981&keywordsrep=&keywordsfyc=&search_type=used&highlightFirstMakeModel=&distance=0&min_price=&rdm=1296485676417&drive=&marketZipError=false&advanced=&fuel=&keywords_display=&end_year=2006&lastBeginningStartYear=1981&showZipError=y&make3=ROV&make2=JEEP&certified=&engine=&page_location=findacar%3A%3Aispsearchform&body_code=0&transmission=&default_sort=newsortbyprice_DESC&max_mileage=&model3=RANGE&color=&address=57101&model2=JEEPGRAND&sort_type=mileageDESC&rdpage=100&awsp=false&max_price=&num_records=100&seller_type=b&make=CHEV (This is an auto trader search for the Jeep, Trailblazer and Land Rover sorted by highest mileage, you have to go down 12 to get to the first Trailblazer and 25 to find the first Land Rover)
Ok so here it goes: You mentioned that you want something that is reliable (again check out the high mileage link. If there are a plethora, yes I said plethora, of Jeeps over 200K and 300K with one over 700K that has to say something.
Maintenance: I understand being in school and having a limited budget so that is another reason why I say the Jeep is the best option. There are so many good forums out there for all platforms of Jeeps you are bound to get the help you need. http://www.jeepsunlimited.com/forums/ (Grand Cherokee sub forum), http://www.nagca.com/ (Grand Cherokee only forum) and http://wjjeeps.com/ (specific to the WJ or 1999-2004 Grand Cherokee. I am active on all these forums and have used these forums to diagnose problems, help with repairs etc. I just did a quick google search and found 2 Trailblazer forums and a few Land Rovers ones as well. But like any any foreign vehicle parts and repair of a Land Rover will be expensive.
You also mentioned engines. I will say Jeeps are not known for gas mileage, neither is the Land Rover. In fact the Land Rover has the lowest MPG out of all three even when you compare the V8 Jeep. But I would recommend the 6 cylinder Motor every mpg is money in your pocket. Here is a side by side comparison http://www.fueleconomy.gov/feg/sbs.htm
As for the offroad/comfort/and room. My friend had a Trailblazer and we all went camping up near Shoe Creek VA ( http://www.google.com/search?q=shoe+creek+va&tbo=p&tbs=vid%3A1&source=vgc&hl=en&aq=1&oq=shoe+creek ) and when he was worried about one of the water crossings being too deep he jumped in the Grand Cherokee. He said that it was way roomier and more comfortable than his. I never got a chance to ride in it before he sold it for a Grand Cherokee but it must have made an impression. Sorry the only Land Rover I have been in/driven was a Defender 90 and that rode like a tank on the road...but that is in a class by itself.
Ok that was more like $1.02 worth of input but hopefully it helps..