What DVD recorder to buy ? (for entertainment )

Hi,
I am new in DVD recorder. I want to get a recorder to
replace my VHS. I have ±300 $ to spend. It s for recording television programs and movies on the cable.

I read a bit about the DVD+ recorder that seems more flexible and about the DVD-RAM . I want to be able to
register different 30 minutes programs on the same disk.
I think with the DVD+ and DVD-RAM you dont have to
finalize the disk and still be able to watch your recorded program and record another program later on the same disk. Is this correct ? Also for the the image and sound
has to be the best as possible.

So please can you recommend me some good recorder
on the market and the pros ans cons of each media technology.

Thanks