I agree with pdstein, why not pay someone to do something they are good at and stick with what you know? There are plenty of web designers who specialise in building CMS based websites at very affordable rates.
Having said that, there are a lot of great looking templates that work very well with Joomla (a great CMS by the way)and with a little bit of playing around, they are pretty easy to implement.
Check out these sites for some cool templates (Joomla):
http://www.joomlajet.com
http://www.joomlashack.com
http://www.joomladesigns.co.uk/News/...e-gallery.html
Finally, if you need a little more advice on this matter, check out the following links, they might shed some light on your dilemma (forgive the shameless plug):
http://www.webwiseworkshops.com/plan...e_managed.html
http://www.webwiseworkshops.com/plan...templates.html
http://www.webwiseworkshops.com/plan...fessional.html
Hope this helps
WebWiseG