Which sequencer should I go with?

Okay, I don't know what to do.

I used to use Sonar for my recording of songs, but unfortunately Sonar doesn't run too well on my laptop. So I thought maybe I should try other music programmes.

What I want to do is to be able to record audio, but also sequence midi and synth tracks. Which do I go with? I'm confused! I have great idea for blended electronica-audio stuff, but I don't have the software to do it. So I'm open for suggestions.