Best type of permalinks?

So, there are three types of URLS :
[B]

[list=1]

[/B]

Out of the three, I’m sure the last one i.e. [B][url]http://site.com/topic-linux[/url][/B] would be the best for SEO.

My question is, for ease of development, if I add the forum id along with the URL like this : [B][url]http://site.com/topic-linux-10[/url][/B] , will it have any adverse effect on the SEO??

Ease of development means, for example, if I have a topic URL like this : [B][url]http://site.com/topic-hello[/url][/B]
Since it is a common topic title, we’ll be needing to use [B][url]http://site.com/topic-hello-1[/url][/B] in the next so, why not use the topic id itself??

Any adverse effect?

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