You can go with any of the below VGs with modules like Cisco VIC2-4FXO
http://www.cisco.com/c/en/us/products/unified-communications/vg-series-gateways/index.html
http://www.cisco.com/c/en/us/td/docs/routers/access/vg310_vg320/hardware/installation/guide/bm_vg310_vg_320_voice/bm_vg310_vg_320_voice_chapter_01.html#concept_DA6FB7475846411399E257410CE149FF
If you want to go with the higher end models, then go for any ISR and select the appropriate modules.
HTH
Rajan