Slot Ram Hosting

Hey,

I'm looking to start up a new hosting company and wondered how
many slots/servers I could get on these Dedi's:

Server 1:
Intel Core i7 860 @ 2.80GHz
12GB RAM
2 x 1500GB HDD's

Server 2:
Intel Core 2 Quad 4 x 2.83GHz
8GB RAM
2 x 1000GB HDD's
100Mbit Shared Connection

Server 3:
Intel Xeon E3-1230 4 x 3.20GHz / E3-1270 4 x 3.40GHz
8GB DDR3 ECC RAM or 16GB DDR3 ECC RAM
1TB SATA HDD 7200rpm or 60-120GB SDD's
Optional Raid 1/0
Optional SSD
1GBit/s Onboard With 100MBit/s-Uplink (Optionally up to 1GBit/s)
Traffic 10TB p/m

Also anyone know any good Dedi Server Hosts?

Thanks in advance,

James