Wanted to draw your attention to modern concepts in sol-gel, described in Journal Sol-Gel Science and Technology 2006, 40, 163-179 and also in the upcoming book "Sol-Gel Methods for Materials Processing: Focus on Materials for Pollution Control, Water Purification and Soil Remediation" edited by Innocenzi, Zub and Kessler that will be available from Springer in July.
Advises in short:
1) if you do not use organic modifiers, add more concentrated mineral acid (HNO3, HCl etc.) mixed in advance with 4-5 times bigger volume of parent alcohol. And add this solution to the solution of alkoxide slowly and dropwise, on vigorous stirring/shaking. You will make more electrically charged micelles through protonation and will achieve better stability. The longer chain is the alcohol you are using, the lower is the required charge (less acid!). The classics, like Yoldas(look for the name in literature and read), worked with n-butoxides (whatever derivative you take, TTIP etc., but in butanol), n-propanol is also good, i-propanol worse and a lot of (concentrated!) acid is required in ethanol.
2) Working with the carboxylates (whatever you take of alkoxide - all of them are in fact strong bases, will immediately be a carboxylate in a carboxylic acid, such as acetic acid) will offer you oxycarboxylate aggregates ("oxoclusters") on hydrolysis, which leads to transparent sols, because of their small size.
It is the size of the micelles that causes opacity. If you keep micelles from aggregation you will have transparent colloids even when they are really concentrated.