Hi guys,
My Dell PowerEdge PE840 server is really out of stream running CUCM pub, CUCM sub and UCCX. Eventually I need to run 5 VMs simultaneously: CUCM, UCCX/IPIVR, Router+Logger+PG+AW, clients on XP. It seems I can either buy a recent powerful PC or an old/refurbished Dell/HP server (budget $800). Would you share some experience? 

i7 CPU, 32G DDR3 RAM (dirty cheap), 1T or more HDD. Should be cool and fast;
PE1950 or 2950, 2 x quad core CPU, 32G ECC RAM, 500G HDD. Will it be very noisy?