If you buy from Japan just about everything coming out on TV now-a-days sees a Blu-ray release. If your stateside your options are very limited...as they have always been.
Personally I stopped buying anime stateside years ago. These days I download fansubs while the show is begin broadcast in Japan and assuming I like the series I will import the Blu-ray/DVD release when it goes on sale in Japan. I support the industry like this because a lot of the shows I've watched over the years got a second (and sometimes third) season based on how well the DVDs sold.
One could argue that I'm not supporting the English speaking side of the industry and to that I say: I don't care, let it die. In the late 90s and the early part of this decade I spent several thousand dollars on anime through the likes of FUNi and ADV and compared to what I could buy in Japan the content was just disappointing.
I care nothing for the dubbed script, the subtitles were the only important part of the translation for me and when compared to what the fans have put out the "official" subtitled translations were just awful in a lot of cases. Video quality is no where near as good on NTSC-U releases when compared to NTSC-J on DVD, not only do they cram more episodes per disc in the states they also have to include an extra audio track for each episode.
Basically the more of an anime fan I became the more I started to hate the way the anime got butchered when it came over to the states. Eventually (around 2003) I just stopped buying anime in America all together and long before that I had already refused to watch it on TV.
I'm not going to argue if downloading the fansubs is right or wrong but there is no denying that if your a fan of anime and you live outside of Japan it is the best method for watching all the new stuff begin broadcast in Japan. Especially if an English translation is important to you or if you don't feel like learning how to use the popular Japanese P2P networks.
If your worried about the legality of downloading fansubs perhaps
crunchyroll is for you. You can stream fansubbed anime directly from that site legally. From what I understand that site pays a fee to be able to legally distribute the anime they carry. However be warned that they do not carry everything that is begin broadcast in Japan in any given season and tend to concentrate on the more popular shows. There are also limits similar to rapidshare imposed upon free accounts.
Also one last important thing to mention; A lot of the anime released on DVD/Blu-ray in Japan includes English subtitles on the disc. You'll want to double check before buying of course. So if Blu-Ray is really important to you start looking in to importing more of your anime as a lot of popular series are seeing "re-releases" in Japan right now.