I have 3 offers for storage systems for primary location and 2

HP offer:

EVA 6000 (15x300GB/10k, 15x500GB FATA) - primary
2x MSA 1500 (15x 500GB SATA) - colocation

IBM offer:

1x DS4700 m72 (16x300GB/10k, 16x500GB SATA) - primary
2x DS4200 (16x500GB SATA)- coloaction

EMC/DELL offer:

1x CX300 (15x300GB/10k, 15x500GB SATA)- primary
2x MD3000 (15x500GB SAS)- colocation

Price for all 3 offers is the same. What do you recommend?

Thanks in advance,..