<p>Are there any <strong>professional</strong> Combobox controls (dropdown list with autosuggestion) based on the jQuery library?</p>

<p>It should be able to handle <strong>large datasets</strong> and have some <strong>skinning</strong> options. A <strong>multi-column result list</strong> would be great too. I'm working with ASP.NET, but it's a not a problem if I had to write a wrapper for it.</p>

<p><img src="https://i.stack.imgur.com/ilhvD.png" alt="alt text"></p>

<p><em>I'm already using a third-party control, but I ran into some compatibilty issues between two vendor's controls. Well, I want to get rid of this kind of dependencies.</em></p>

Unfortunately, the best thing I have seen is the
jquery.combobox
, but it doesn't really look like something I'd really want to use in my web applications. I think there are some usability issues with this control, but as a user I don't think I'd know to start typing for the dropdownlist to turn into a textbox.
I much prefer the
Combo Dropdown Box
, but it still has some features that I'd want and it's still in alpha. The only think I don't like about this other than its being alpha... is that once I type in the combobox, the original dropdownlist items disappear. However, maybe there is a setting for this... or maybe it could be added fairly easily.
Those are the only two options that I know of. Good luck in your search. I'd love to hear if you find one or if the second option works out for you.