Barrelchief, I would not miss out on either the 1-UP upgrade or the Spider. I did the 1-UP upgrade a year and a half ago and it was a solid improvement. The Spider was surprisingly good, but my system is tremendously more revealing now when I added the Spider than 1.5 years ago and it is now hard to separate what each upgrade will be worth more to you in your system.
If you have the cash to do both (and I would do both), I would suggest that you do the 1-UP (get them to replace the internal RCA connector with a shielded silver wire as well if you are going to use the RCA out from the EMC) and then get the Spider.
If you do not get enough sonic improvement out of the Spider in your system, you can sell it to Subaruguru (if he has not broken down and bought a Spider by then). I am guessing that the 1-UP will also be a lot easier re-sale in the used market if you ever decide to sell it down the road and you should be able to recover a percentage of the cost of the Spider.
You can contact Brian Ackerman at Artistic Audio or Fs Audio and work your best deal on the 1-UP upgrade. The turn around time was only a couple of days at the factory plus shipping time when I did mine. The Importer, Allan Warshaw was good about booking appointments and will have you ship your unit directly to them when they are ready to work on yours. You won't be without your player for long.