Thank you all for your detailed responses, it helped me and I am inclined on the following idea :
LinkSys Switch (This is 48Port GB Switch and is way too cheaper - why ?)
I am inclined towards HP Procurve ; but due to budget I can't select 2 x 48PORT Gigabit switch, so I am selecting 2 of the following :
HP Procurve 2510
I will then get a Gigabit switch 12 / 16 port to connect the servers with and uplink the two procurve 2510 (10/100) to the gigabit switches ?
2510's are stackable, so i would stack 2 switches for lan users and use a Gigabit uplink to the server switches.
Do you think I should create V-Lans with 70 users ? traffic is mainly desktop to server (MAIL, file shares) etc
Also, I had a look at Dell offerings and there Powerconnect switches are :
Dell 3548 48 Layer 2 GigaBit £390
Dell 5424 24 Layer 2 GigaBit £550
Dell 5448 48 Layer 2 GigaBit £790
Confused now, your expert opinion required :-)