I just talked to Matt at Wadia 2/16/04 on this very subject. The upgrade is $2k 860>861 and $2k for 861>861SE. I asked if there were any package deals and his reply was "Funny you mention that, we've been considering a package price for awhile now. We plan to finalize a decision this week and I'll call you back on it. It would be a temporary discount when both upgrades are done at the same time. The discount would amount to $500 off the total."
Hope this helps.