.net Usercontrol Vs Customcontrol Vs Stringbuilder?

I'm building a product catalog which displays between 50/100 products per page.Since I want to have different browse sections on my site I've put each product into a UserControl. Well, not the products themselves ofcourse, but some labels, divs and images. I then set its properties in run-time when processing the database results. So the advantage is that I only have to change the product control at 1 place for the whole site. I'm putting the controls in a page using LoadControl in a loop.

However the pages are not loading quite as fast as other pages which process the same db query and output the same html using a StringBuilder. And since I want my site to perform well if/when it receives some decent traffic I'm worried about this. I haven't done any benchmarkings yet but I clearly see the difference. My questions to you is 'Are there any alternatives which are faster then using LoadControl with a customcontrol but are easily maintained (or atleast in 1 location)?'I was thinking of:

Creating a customcontrol (although I've never done it and don't know 100% if this will speed things up)Continue with the StringBuilder method and put the CreateProduct in my base class

[edit]Code[/edit]

I don't have the excact usercontrol code here but I will edit this post when I get home..but here is the simplified idea:

1) Getting my database result (using Subsonic 2.2 as my DAL)

DAL.ProductCollection coll = new DAL.ProductCollection();
if(coll.count > 0)
{
foreach(DAL.Product item in coll)[code]....

My usercontrol itselves just consists of 3 Literal controls and 1 Image control.