Do I really need a capture card for editing hdv? Help!

This is driving me crazy. I can't seem to wrap my mind around what's required in the whole editing workflow, despite countless hours perusing forums, Googling, and reading mfg websites. I've never done this stuff so I'm having a hard time grasping things. I'm reading about Aja Kona 3 this, Aja lo HD that, Blackmagic Multibridge Pro and Eclipse, Blackmagic Intensity and Intensity Pro, Blackmagic HDlink and HDlink Pro, Motu V3HD, Matrox MXO, etc., etc., etc. AHHHHhhhhh. I try and figure out which does what, blah blah blah. They all seem to claim they're sent from God and do everything better than something else. It does this and this and this, and no other card does... but the other card says it does too, even better. It's drivin' me flippin' crazy.

Here's what I plan on doing... any help would be AWESOME!

I do not plan on doing any client work (such as weddings, corporate videos, projects for companies, etc.), all production would be by me and for me. My camera is a Sony EX1 and a Sony HC7 B camera. The HC7 won't see substantial use, so I don't think I need a separate deck. So the vast majority of my footage will be shot on Express SxS cards. I don't need various input options. I want my footage to be high enough quality to meet the demands of HD channels such as Nat'l Geo HD, Discovery HD, Travel Channel HD, etc. Not that they'll be knocking on my door demanding my footage (but hey, you never know!), but I want that as an option. That's the main reason I went the Sony EX1 vs. the Panny HVX200. Higher resolution. I want to create hd nature stock footage. I will also be creating my own wilderness adventure footage, which when I get my wilderness adventure photography/videography website up and running, I can sell some DVDs as well as having the option to sell Blu-ray when it becomes more standard. I will be running a new Mac Pro, two 3.0 GHz quad-core chips, 12GB ram, Caldigit HDPro 2.6 TB raid, NVIDIA GeForce 8800 card, 30" and 24" Apple displays, editing with Final Cut Studio. For monitoring I will most likely get the Matrox MXO (waiting to see if the GeForce 8800 is compatable... so far it's not been tested with MXO).

Question: Do I need a capture card for editing this stuff? Can I just do everything in Final Cut Studio and burn the footage onto Blu-ray or DVD? Will the Matrox MXO be sufficient? I keep thinking I've got it figured out until I read about some card and think, wow, maybe I need that too. Do I need a Kona or Fiona or bologna or some magical black contraption? I'm about ready to pull the trigger on my purchase (unless I put the trigger to my head first) and I'm starting from scratch and I want to do it right and not kick myself on my very first project. I'm trying not to be ignorant but I can't help it, I just can't grasp all that I need. THANK YOU for any help. If I become a billionaire through my productions, I will remember each suggestion and reward those of you who respond with 1.2 meeellion dollars. That's American dollars, though, so it's not worth much these days.