I'd only have Heskey as a back up option. Hopefully in time he'll be revitalised and play out of his skin like Howard did at the back end of last season.
But it would be more sentimental than anything, we need a goalscorer really, someone like the Yak or Maynard, or maybe Kamara as I think he would score goals if he was played down the middle. The Yak will score goals because we will create plenty of chances BUT in terms of the overall balance of the team, it's hard to have a lazy striker in the system we are playing because he will often be isolated. Sadly I feel this is a problem - 2 defenders can mark him because his movement is non-existant and this will restrict us badly in certain games, such as ones we don't dominate (this has been evident in quite a few games). This is one thing Heskey would be useful for - he'd use his strength and hold it up better, put himself about and get to 50/50 balls first.
If I was Sven I'd put in a bid for Maynard.