As some one who does these transfers a lot, you'll find that the TRV 480 works fine with a few qualifications. First although it will play all 3 types of tapes, it is a lot pickier with the playback of Hi8 and Video 8 tapes (the manual even says this). That's why I have both a Hi 8mm and a digital 8mm camcorder.
The other problem you may run into, is that like many DV camcorders, the heads seem to clog fairly easily. You'll want to go on eBay and pick up an 8mm head cleaning cassette before you start.
Finally, Sony actually packed a lot of features into their camcorders (including TBC on most Hi8 units), and I haven't found any differences between using a deck and a higher end camcorder.
Good Luck on your efforts!