Omans prices are extremely low for the quality of his work. I have seen people trying to charge twice as much and not give half the quality work that Oman gives.
I highly suggest contacting @oman here http://xenforo.com/community/threads/technology-hub-xenforo-installation-upgrade-services.45948/#post-611841 He is fantastic, super trustworthy and very efficient.
For us we couldn't do without Taigachat. Another favorite of our members is Youtube on profile pages and of course the arcade, but I think our all time favorite is @Bob B 's Stocktrader.
I have not had one issue that I can think of. He is thorough and gets the job done correctly. If you want to see an example of what he has done have a look at my site. He did the upgrade and style for us. www.twistedfanatics.com. Good luck and if you need anything else don't hesitate to ask