Vista Business Concurrent connections

I am trying to get a small machine that is going to be a dedicated solution that is hard wired (gigabit). It is going to host quickbooks enterprise for 6 to 8 clients at the same time. It will not be doing anything else. Will Vista buisness handle this or do I need to make the jump to Server 2003?

It will be a HP ProLiant ML110 G4 – Tower – 1-way – 1 x Dual-Core Xeon 3050 / 2.13 GHz – RAM 2 GB – HDD 3 x 160 GB Raid 5- CD – Gigabit Ethernet