Alan,
1. From a "cost" point of view, if the average battery life in the pronto/rc5000 is 4-6 months...how many years of service would you need out of the unit to have replaced the batteries enough times so that the cost of batteries was even close to the cost of the cradle? The cradle seems massively overpriced to me - and it seems that it would be false economy to grab one (but I'm sure that everyone with cradles would have good reasons for having them other than cost).
2. I bought my Pronto from
http://www.letsautomate.com (UK), and it looks like they sell the RC5000 too - but not sure about the 5000i. It's worth a look.
3. I'm colourblind, but I'm 99% sure the screen backlight is blue on the Pronto.
4. If you're interested in memory utilisation - download the latest pronto edit from this site, and grab some System CCFs from this site and load them in. Go to the system panel to see how much memory they use (and compare this to the number of devices/functionality/codes etc in the CCF file. You'll get the idea pretty soon. I was shocked that my CCF only used 50% of memory.
Regards
Floydster