nextel is building heavy in ohio. my employer is waiting on word for a few nextel bids he has in,probably start in a couple weeks. still from inside the business i have to say cingular is the best for service plans and hardware. their coverage is going to dramatically improve once they integrate the newly acquired AWS network, wich will make them the biggest cell provider EVER.
on a side note, they are the only provider currently building UMTS sites.this is considered 4th generation cellular providing dramatic improvements in data transfer rates wich will allow use of high quality streaming video phones. it's currently online in sanfrancisco and has been running strong in phoenix wich was the preliminary test market.