I used the upgrade kit from Arizona Z. Very good quality and they were easy to work with. Very pleased with the performance as compared to the stock brakes. Probably not the cheapest solution but it was brand new and in the limit performed extremely well.
You will need to consider the following:
1. If you are running the standard 14 inch rims, they will not fit over the big brake kit. I have been told that 15" will work, but in my case I went with a 16" Konig rewind. You will also need to consider what you will want to do for a spare tire. I ended up getting a donut spare I believe from a later model Nissan Sentra that had the correct bolt spacing and also fit into the spare tire well. It easily fits over the bigger brakes.
2. At least with the Arizona Z kit, you will need to decide what to do for a emergency / parking brake. The Arizona kit as standard, does not include a replacement for the e-brake. They do sell a mechanical caliper which can be used to replace the OEM e-brake, but they only provide the caliper itself as well as a different mounting bracket. I had to design a method for connecting the e-brake to the brake handle and this was not straight forward. I have been meaning to do a write up on my implementation of this for some time but just haven't gotten around to it yet. If you decide to go in this direction, let me know and I'll get the write up done.
Hope that helps.
Mike.