Your expertise could save me some headache and cash

Which of these options I should go with? The difference in price is not that much, but I want to get the right stuff. Please take note of router and switch models in each option.
Option 1:
2 Cisco 2503 Router & 1912 Switch
16MB DRAM & 16MB Flash
1912 Switch
Cisco Back to Back Cable
Two Serial Ports per router
One Ethernet Port per router
One Console Port per router
One AUX Port per router
Three Power Cables
Console cable
Console cable adapter
Built in ISDN BRI port
Two Transceivers
Option 2:
Two Cisco 2521 16/16 Router
Cisco Catalyst 2924-XL-EN Switch
Back to Back Cable
2 Transceiver