HD workflow set up advice - Sorry if it's a long one!!!

Hi there, I was wondering if anyone can help me out with a bit of advice here!! I'm currently in the process of planning an upgrade to get my mac HD ready for some projects that are upcoming this year. It is an 8-Core with 9GB of RAM with an NVIDIA Quadro FX 4500 graphics card.

So, as i said, I have a couple of music videos and a short film to cut this year that will be shot on uncompressed HD of some sort (most likely Varicam or HDCAM) rather than DVCPRO HD (P2) as I've worked with previously (hence the need for an upgrade of kit!!). The short film in particular I will want to master with the view to a Super 16 transfer at another edit house for certain festival screenings (so i would need a high quality uncompressed master).

I have been looking around and within our budget the following kit could be options within it:

1. Caldigit HDPRO 2TB tower (PCI-E RAID)
2. AJA KONA 3 Capture Card & breakout box
3. Caldigit S2VR HD 1.5TB
4. AJA IOHD
5. AJA KONA LHE Capture Card

I was thinking that the best option would be the HDPRO & the KONA3 but would welcome any help and advice as I'm feeling my way through the dark a bit on this one and I really need to get it right.

For instance, I don't really know what the difference is between the KONA3 and KONA LHE? I think the main thing for me is the up and down conversion capabilities the card offers both in and out?? I know it offers keying etc but don't think that'll really benefit me that much.

I'm also pretty much in the dark about the IOHD! I'm guessing that because of the FW800 and only being able to go to prores422 I might be left wanting a bit in terms of quality that I'd get from the KONA3 especially in outputting to tape??

As i said, if anyone can offer their expert opinion on this for me I'd really appreciate it as I want/have to get this right 1st time!!

Thanks

Alex