Long Island, NY Coverage

I am curious as to how the Cellular Carriers in the Long Island market are in terms of non roaming coverage.

Most people that I know in Long Island have SprintPCS or Verizon. Verizon had a huge headstart in the Long Island market. But SprintPCS has built out coverage very fast and is now alot better than it was when it first came out. SprintPCS when it came out had no contracts unlike Verizon and had more competitive rate plans. I dont know about how prices compare today. Does Verizon still have better coverage or have SprintPCS + Verizon relatively caught up with each other or have better coverage in different areas of Long Island?

In terms of Voicestream/Cingular (as they share coverage in NY), AT&T and Nextel, how is coverage on Long Island for these carriers since I do not know anyone with them in the Long Island area.

Northcoast is going to be another carrier entering this region (they are owned by same company as Cablevision), but obviously they will have a hard time competing with the other carriers as they have not yet even built out in this area.

Would it be correct that in terms of marketshare for current or upcoming carriers for Long Island, NY the following would be correct:

Verizon
SprintPCS
AT&T
Voicestream
Nextel
Northcoast PCS

Since Cingular shares the Voicestream network, I would consider that part of Voicestream above.