I understand and appreciate your opinions. From some diagrams I have seen online, it doesn't look to be too difficult.

I have since found a different system I am interested in. The ACS 6.0 with 4 phones and voicemail. Its all new and comes pre-programmed. It comes from ebay (I know alot of people might gasp at that) but they have very excellent feedback and have unlimited tech support. All in all, it would save me about $800 (if I did the install myself) and I'd have more capability of upgrading in the future vs the SOE (if I understand correctly).

Link removed because it contained pricing.