For my AVR programming I use CodeVision, $150 to purchase, $75 annual maintenance agreement.

The way I calculate it, that's about 50% for annual maintenance.

Annual maintenance for the Keil tools is only 30% :-). That gets all updates for 1 year and phone/fax/email support.

In addition, our knowledgebase has over 2,000 articles on-line, tons of example code, application notes, and so on. I haven't looked lately, but I don't seem to recall as much web-based support available for other vendor's tools.

If you compare apples to apples, you'll most likely find the Keil tools are just what you want/need.

Jon Ward
Keil Software