Watcher, please scoot to a thread that actually applies to you.
As for my preference, I started with the HD-A1, and I still love it, despite it's molasses speed. I'm also an avid lover of the underdog,which also contributes to the support I give to HD. The Matrix set is a fine piece of work as well.
Having said that, the Pirates BDs (specifically Dead Man's Chest) show that the higher bitrate and storage ability of BD CAN make a difference, for studios like Disney and Sony that actually take advantage of those abilities. I can get dual-format releases I want on BD for $7-10 cheaper than I can their HD combo counterpart, and the difference on loading times between my PS3 and my HD-A1 is astronomical, all signs that point to my BD collection catching up with my HD collection at some point this year.
Both formats still have their flaws - HD should have taken a more aggressive approach with disc size and bitrate abilities, while BD should have taken a big note from HD and had their software solution be one that was all-encompassing and mandatory from the start and not some half-baked incremental solution.
Universal provides mostly dual-layer quality titles at $19.99-24.99 (at most retailers) with generous extras (on most), Fox provides mostly single-layer quality titles for $34.99 (at most retailers) and next to no extras. Warner BDs I can get for about $27 B&M on day and date titles, whereas they want me to pay $34.99
B&M for the same title on HD Combo.
There are pros and cons to both, but I'm starting to lean more towards Blu in regards to total technical quality. This is not to say I am abandoning HD though (I may be the only one, but I am genuinely hyped to have Darkman in HD with lossless audio).