Well techma1, if you bought a new switch, EC500 with an IP Softphone license has a bundled price of $130 each NPL (list)
In reality, it costs LESS to support the newer switches, and, you are probably not aware of this, but the S8300 has a few bundles, that are very, very inexepensive. there is a 50 user, 100 user, 150 and a 200 user bundle. The G700/S8300 hardware is much less costly than the TN circuit packs, the new gateways are all IP enabled and come with the equivilant of CLAN, MEDPRO and a VAL all built in. I started with the older platforms, but the new stuff is far better, and less costly.
I work for an AVAYA Business Partner, I setup new S8300's and S8710/20 systems mostly, there is no comparison on the ease of setup of the newer systems, as long as you are well versed in LAN / IP technology. I can setup an entire S8300, in about 4 hours, using ProVision or starting with a previous client translation (you restore an old trans and re-work it). Also, most customers now want IP phones, CISCO has done a good job of convincing clients they need IP, although it does't really get them much. Also the IA770 is great, it now comes FREE with CM4, so we don't have to price out a separate audix LX or Modular Messaging system for most of the smaller clients
try to be more open minded, older doesn't always mean better.
Mitch