geoff, something just occurred to me. Based on the subject of your message, you may have been asking which is better, the Pronto or the TC1000? The answer would be that they are the same. "TC1000" is the model number of the Philips "Pronto" remote control.
If you meant to ask which is better, the Philips TC1000 Pronto, or the Marantz RC5000, you can read about the differences in the RC5000 FAQ (frequently asked questions) at
[Link: remotecentral.com]. The remotes are essentially, but not completely, the same.
On the surface, the regular Pronto is dark bluish green in color (and its color is solid throughout the plastic), while the RC5000 is painted gold. (The silver Pronto is also painted.)
The charging base is optional for the green and silver Prontos, and only comes in silver. A gold charging base is included with the Marantz RC5000.
The warrantees among those models vary somewhat. You can read the above mentioned FAQ, plus the FAQ at
[Link: remotecentral.com] to learn more about that and the slight differences in features. Plus you can do a search of this forum for "warrantee" and "warranty".
Only you can determine which is better for you - green, silver or gold.
Personally, I prefer, just slightly, the featureset of the green and silver Philips models over the gold Marantz. I don't like the color of the green Pronto at all, but do like the fact that the color is solid throughout the plastic - scratches and wear won't show as easily.
Hope that helped.