Can I ask why you are going down the Mini-DV route?
The redering time taking a download from Mini-DV and creating via the relevant codec is very slow compared to purchasing a HD camcorder with USB2.0 and just downloading files as native MPEG4.
I used to do mini-DV and it drove me to despair as you had to "play" the tape real-time to capture the footage, edit and enhance via Pinnacle/Roxio then after all that the rendering process took ages (even with a decent spec desktop), was suseptable to failing and the end quality wasn't great.
I would suggest you to have a look at the cheaper HD camcorders that are around - I know you can get some of the 30Gb JVC models for around the £200 mark at the moment so there are probably options for your budget.
Just a suggestion but you are "investing" in aged technology - why not go for the modern option and save yourself a lot of lost rendering time. Roxio 10 has drop-in features for MPEG4 and I can create DVD projects in tens of minutes rather than the hours it used to take me.