If I understand your problem. You are able to transfer the videos from your Sony DCR-HC96E to your Philips DVD/HD but are unable to record and finalise the DVD. This would indicate the problem is not with the Sony DCR-HC96E but with the Philips DVD/HD possibly with the way you are copying the file to the disk or the disks them self. Buying a new camcorder may not rectify this problem.
Assuming your computer has a DVD/WR you could follow the instructions in the manual on transferring from the Sony DCR-HC96E to the computer or writing to a DVD disk, you may need to download and install from the Sony site a program to do this.
As an afterthought are you using DVD-+ disks. I had problems using DVD-+ disks on my Sony DVD/HD a few years ago not finalising.