@Ross1
The Video Toaster Flyer is very flexible and you can use almost any size SCSI drive with it. You must have an Amiga 2000/3000 or 4000 in order to use it though but the 4000 gives you extra capabilities that you dont get with the other two.
;-)
Sitting just to the left of my A1 is a Randomize Genesis Flyer. This is a 1200 sitting in an RBM Towerhawk tower with the Onboard 1200 T/F Zorro II busboard, a KeyOn 1200 keyboard adapter, and a VidiOn video slot adapter. It allows all the T/F features that the 4000 does. It works quite nicely, even if it is a kludge.
As to the original question, most modern PCs don't need non-linear hardware. They are fast enough to do video editing totally in software. All you need is decent software, and the right interface to get the video into the computer. I use (admittedly low-end) Pinnacle Studio on an Athlon 64 3700+ (San Diego) with only 1 MB RAM. Definitely not a high-end machine. A Core 2 Duo would kick this thing to the curb.