Hopefully not totally off-topic.

I have just started researching upgrading to DirecTV HD and found Weaknees. I currently have 2 Hughes Tivo receivers (1 35 hr, 1 70 hr) that I purchased (probably from BestBuy) and was wondering what path to follow to get to DirecTV HD. I know I need a new dish and believe that I would get free installation from DirecTV. Should I also get the HD DVR receivers from them also or can I purchase from Weaknees (like an upgraded HR21)? I also see in various places on Weaknees that after 03/2006 receivers from DirecTV are considered leased, but it looks like I pay the same price to "buy" the receiver from Weaknees as "lease" from DirecTV ($199.00 for the HR21 for example). Advantages? Disadvantages?

Would appreciate any help from somebody who might have just recently went through the process. I did some searching on Weaknees, if I missed a thread or FAQ with the answers, I will gladly accept a pointer to the location. I know I need to call DirecTV but I was curious on a view from another angle. Thanks