Well, you've got lots of options. The AX200 is a nice, bright projector, but does have some history of problems (search on this site for some threads). However, pretty much every projector out there has some sort of problem associated with it, so it's like anything else in this world that you buy. It'll handle blu-ray and SD-DVDs just fine.
As far as portable screens go, I used the Epson Duet screen for awhile in my family room, and it's a very portable system. It's about 80" diagonal, and instead of collapsing vertically to produce a long tube, it collapses horizontally, and the stand attaches to the case making it easy (but kind of heavy) to carry. It's primary problem is some sag in the middle of the top of the screen, but depending on how picky you are, it's not a huge problem. They're pretty reasonably-priced, too.
Blu-ray players depend heavily on if you want a standalone player, like a regular DVD player, or you can handle having a "game" player, (i.e. the Playstation 3) in your system. I have 2 PS3's primarily for blu-ray in my 5.1 family room setup, and my 7.1 basement theater. It decodes all advanced codecs internally and passes them to an HDMI-equipped receiver, but is unable to bitstream the codecs to a newer receiver to be decoded. It's also 2.0 compliant, due to another recent firmware update, and is only one of very few players that is. Additionally, it upscales standard DVDs very well, and is fast to load and use. Also, it plays games and works as a network media server if you have MP3s/photos/videos on your computer that you want to have access to. Negatives are that it's a relative energy hog vs. standalones, uses bluetooth for remote control (vs. IR, however there are some third-party solutions for using your regular universal remote with it), and is an odd shape for integration into a rack. If you want/need a standalone, the Panasonic BD30, while difficult to find, is comparatively priced with the PS3 (which is one of the cheapest ways to get into blu-ray). If you can wait, and afford a little more, the Panasonic BD50 looks very promising. Pioneer, Denon, and Sony all have some decent standalone units, as well.