Sweet Pepper Recommendations?

Hi,

I have quite a few stored chilli peppers this year, so I was thinking of concentrating on trying to grow some nice sweet peppers this year.  Does anyone have any recommendations?

I do usually try to do some sweet peppers, but with variable success.

I have windowsills, a cold greenhouse and a large coldframe to grow them in.  I live in Aberdeen, so the growing season is relatively short.  I have grow lights in the house so can start them off now, but would prefer a shorter/smaller variety if possible.

Thanks 
Dawn