The 6230 is a great phone, I used to have it before I bought myself an mpx220 on E-bay. Even though there have been a lot of problems with this model, I have not had any since I upgraded the Firmware on it.
What kind of features do you want on the phone?
Camera? What quality?
High Speed Internet (Edge) or just GPRS?
Let me know, and I will help you find a perfect phone for you.