OMG A DAS BOOT VIRGIN!
You have to have to have to see it!
My advice would be to see the director's cut first and then find a copy of the uncut (miniseries) version, which you will probably have to buy.
If you have Netflix or any decent kind of video rental nearby, you should be able to rent a copy of the director's cut.
Or just don't waste the money on the rental and put it towards a purchase. I'm pretty sure I got the DC from Amazon pretty cheap. The extended version is more expensive but Amazon does have it - only drawback to getting only that one, IMO, is that there's no commentary track and I really enjoy listening to those after I've seen a movie a coupla times.
Honestly I'd lend you one of my copies except they don't leave my home unless they do it in my possession.