Hi, and welcome to a whole new level of addiction.
You already own good titles!
I got about 300DVDs. Some good movies that I treasure much:
- Saving Private Ryan
- Goodfellas
- The Matrix trilogy
- The X-Men trilogy
- any Harry Potter movie
- any Tarantino movie
- any Pixar movie (all of them mindblowing on a good HT)
At 300, I have mostly every DVD I want, there not much coming out worth buying these days anyway, maybe a dozen a year... Nowaday, I keep a very small list of movies I really want, mostly classics, and pick 'em off as I see them at good prices here and there.
You should really consider buying only what you plan to watch more than once. As you will find out soon, there's always somebody that has currently more DVDs than you will ever have
To really kickstart a DVD collection, you could check out E-Bay under "Wholesale DVD". Me and my buddies at work really got some good movie collections at well below 4$ per DVD. There are different size lots too. Check it out. Just be careful and read the fineprint, as usual.... Anyway, just by browsing those collections, you'll surely find some movies you want anyway.
I never buy movies full price, I always wait for second hand deal at blockbuster or similar. You can also pick up really great titles for 5$-8$ each at BB, HMV and Futureshop.
I hope it helps. Good hunting.
Cheers.